Safety and Compliance Information

Prev Next

Accent® 800 is a speech-generating device that offers user-friendly features to make speaking fast and easy for individuals with severe speech impairments. This manual describes how to use and maintain your device safely.

If you need help setting up, using, or maintaining the product or if you need to report an unexpected event related to the product, please contact us at 800.262.1984 or accentsupport@prc-saltillo.com.

Safety Guidelines

Device Safety

Emergencies

  • This device is not intended to be an emergency call device or sole communication aid.

Modifications

  • Do not attempt to modify the device, module, or any accessories. Modifications could create a safety hazard and make the equipment inoperative.

Contaminants

  • To prevent ingestion of bacteria, dust, and dirt, do not allow the user to chew on the product.

Cleaning, Maintaining, and Servicing

  • Do not service or maintain the device while in use. Disconnect the charger and turn off the device before cleaning.

  • If the device, module, or an accessory is damaged, call Service for assistance. Do not attempt to make repairs yourself.

Accessories

  • Do not use accessories, detachable parts, or materials not described in the manual.

  • Do not use accessories, detachable parts, or materials in any other way than described in the manual.

Mounting and Positioning

  • A qualified person should analyze positioning to prevent repetitive stress injuries to the user.

  • A qualified person should install and adjust any mounts, including switch mounts. Failure to install the mounting system according to the manufacturer's instructions may result in an injury to the user.

  • Do not place the device with an eye tracking or head tracking module attached where it is difficult to operate or difficult to disconnect from the charger.

Vision and Hearing

  • The communication partner should ensure that the user takes frequent breaks to avoid eye strain.

  • Consult your vision care provider about device positioning considerations for the user.

  • Excessive volume or sound pressure level when using earphones or headphones can cause hearing loss over extended periods of time. Set the volume to a low level and increase it only enough that you can hear comfortably.

Ports and Connectors

  • Keep ports and connectors clean to maximize the service life of the device. Dirty cable connectors transfer contamination to the mating connector on the device and may degrade performance.

  • If the device has been exposed to water, each USB port must be completely dry before a USB cable is inserted into it. To remove moisture from the USB ports, shake the device several times with each USB port facing downward, and then use a microfiber cloth to wipe the device dry. You should then check the USB port area again. If moisture is still visible in any USB port, repeat the shaking and drying procedure.

  • Do not try to force a connector into a port. Be sure to insert the connector into the correct port and that the connector is turned so that it matches the orientation of the port.

Small Parts, Cords, Cables, and Straps

  • Cords, cables, and straps are potential entanglement or strangulation hazards. Consider this prior to placing these items with device users.

  • On a regular basis, visually inspect cables, cords, and connectors for damage or wear, especially where they are subject to extra stress. Cables and cords can become frayed or damaged from heavy use or with age. For example, a frayed cable could cause a battery charger/power adapter to short-circuit, posing a hazard to the user. If any cable, cord, or connector is damaged or worn, call Service for a replacement.

  • When unplugging a cable or cord, grasp the connector instead of the cable or cord itself to avoid damage or wear.

  • Always use cables, for charging or transferring vocabulary files, according to the instructions in the manual.

  • If the stand is removed, it becomes a potential hazard for poking an eye. Closing the stand could pinch a finger.

  • The stylus is a potential hazard for poking an eye.

  • If you are installing a head tracking or eye tracking module, the loose screws can be a choking hazard.

  • Small parts and loose adapters can present a choking or other hazard.

Damage

  • Do not use the device if the screen is cracked or broken.

  • Do not use an eye tracking or head tracking module if the lens is cracked or broken.

Interference

  • When operating this device in a medical environment, do not use it with any product that is not medically approved. Follow all rules for appropriate wireless device use.

  • Do not use the device or module close to sources of RF/RFID radiation or you may encounter interference. Move away, if possible, from the source of the interference.

Water

  • If the device has been exposed to water, each USB port must be completely dry before a USB cable is inserted into it. To remove moisture from the USB ports, shake the device several times with each USB port facing downward, and then use a microfiber cloth to wipe the device dry. You should then check the USB port area again. If moisture is still visible in any USB port, repeat the shaking and drying procedure.

  • The device is intended for use in normal communication situations. It is not waterproof. Do not spray or splash liquid directly on the device and use extreme caution when using it around water. As with most electronic devices, you should never use the device when you are actually in the water (for example, a pool or bath).

Heat

  • Do not place the device or module in an appliance such as a microwave or oven, near an open flame, or on or near a source of heat such as a stove or heater.

  • Do not leave the device or module in a hot vehicle for a prolonged period.

Batteries and Charging

  • Use only the battery charger provided with this device.

  • Do not place the device where it is difficult to operate or difficult to disconnect from the charger.

  • Always follow the instructions in this manual when charging the device.

  • Do not insert any object into the charging port. This can result in damage to the port.

  • To avoid electric shock and damage to the device, do not charge the device while it is wet or in an area where it could get wet. Do not handle the device, charger, or cords with wet hands.

  • Locate the device in a safe, dry location while charging. Do not charge the device outdoors.

  • Keep the charger away from water and do not allow water or any other liquid to spill on it.

  • If the charger or charger cord is damaged, call Service for a replacement.

Environment

  • Do not take the device into an oxygen-rich environment (operating room, oxygen tent, etc.).

  • Do not use the system in an environment in which explosive or flammable gases could be present.

Touching the Surface

  • While the device is charging, touching the surface of the device with broken skin may aggravate a wound.

  • While the device is charging, high-risk groups should not touch the surface if there is a chance of burning the skin.

Implantable Medical Devices

A minimum of 6 inches should be maintained between a handheld wireless device and an implantable medical device, such as a pacemaker, implantable cardioverter defibrillator, vagus nerve stimulator, shunt, or stent, to avoid potential magnetic interference with the medical device. A person who has an implantable medical device:

  • should always keep the device a minimum of 6 inches from their implantable medical device;

  • should not carry the device in a breast pocket;

  • should move the device away from themselves if they suspect it is interfering with the implantable medical device;

  • should read and follow the directions from the manufacturer of the implantable medical device.

  • If you have any questions about using the wireless device with an implantable medical device, consult your health care provider.


Software/App Safety

  • The software is not intended to be an emergency call app or a sole communication aid.

  • Use the software safely while texting. Do not text while performing another task or activity.

  • The communication partner should ensure that the user takes frequent breaks to avoid eye strain.

  • Consult your vision care provider about positioning the device for the user to view the software.

  • When adjusting volume in the software, excessive volume or sound pressure level when using earphones or headphones can cause hearing loss over extended periods of time. Set the volume at a low level and increase it only enough that you can hear comfortably.

  • If the software stops functioning, contact the Service department.


Eye Tracking Safety

The following safety guidelines apply to devices with an attached eye tracking module purchased from PRC-Saltillo only.

Fatigue

  • While the user is getting used to eye tracking, take frequent breaks to rest the user’s eyes and relax his or her concentration.

  • Some people may experience a certain amount of fatigue (due to intentional eye focusing and hard concentration) or even a dryness of the eyes (due to less frequent blinking) when first getting used to eye tracking. If you are experiencing fatigue or dry eyes, start off slowly and limit the length of your eye tracking sessions to your comfort level. Moisturizing eye drops can be helpful to combat dryness.

Seizures

  • Some people may have epileptic seizures triggered by light flashes or patterns. This may occur while presented successive pictures or video material, even if they have never had a seizure before. Observe the individual using the system. Move the person away from the system immediately and consult a physician if the individual shows the following or similar symptoms: involuntary movements, disorientation, convulsions, loss of awareness, or altered vision.

Infrared Emissions

  • Eye tracking systems uses infrared (IR) technology. Certain medical devices are susceptible to disturbance by IR emissions. Do not use the eye tracking system when in the vicinity of such susceptible medical devices. If you have questions about the susceptibility of a medical device, consult the manufacturer of the medical device or your health care provider.

  • If you have questions about the susceptibility of a medical device to the infrared technology that is part of your eye tracking system, consult the manufacturer of the medical device or your health care provider.

Compliance Information

Device Compliance

Federal Communications Commission (FCC) Warning

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications to this device not expressly approved by PRC-Saltillo could void the user’s authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radiocommunications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

  • Reorient or relocate the receiving antenna.

  • Increase the separation between the equipment and receiver.

  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

  • Consult the dealer or an experienced radio/TV technician for help.

Innovation, Science and Economic Development Canada (ISED) Warning

This device complies with Innovation, Science and Economic Development Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause interference, and (2) This device must accept any interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux Innovation, Sciences et Développement économique Canada ( ISDE ) applicables aux appareils radioexempts de licence. L'exploitation est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur del'appareil doit accepter tout brouillage radioélectrique subi, même si lebrouillage est susceptible d'en compromettre le fonctionnement.

FCC RF Radiation Exposure and SAR Statements

This device has been tested for body-worn Specific Absorption Rate (SAR) compliance. The radio module has been evaluated under FCC Bulletin OET 65C (01-01) and found to be compliant to the requirements as set forth in CFR 47 Sections, 2.1093, and 15.247 (b) (4) addressing RF Exposure from radio frequency devices. This model meets the applicable government requirements for exposure to radio frequency waves. The SAR limit set by the FCC is 1.6 W/kg.

Wireless Communications Equipment

Wireless communications equipment such as wireless home network devices, mobile phones, cordless telephones and their base stations, and walkie-talkies can affect this device and should be kept a least six inches away from the device.

Limitation of Intended Use, Third Parties, and Data Loss

  • PRC-Saltillo does not warrant any functionality of this speech generating device outside the terms of its express warranty relating to the intended use of speech generation. PRC-Saltillo does not warrant any third-party software, nor is it responsible for any injury, damage or claims arising from the function or malfunction of any third-party technology, websites, products, and software. Additional uses may require further clinical determinations beyond the scope of an evaluation for speech generation devices.

  • PRC-Saltillo assumes no responsibility for any loss or claims by third parties which may arise through the use of this product.

  • PRC-Saltillo assumes no responsibility for any damage or loss caused by the deletion of data as a result of malfunction repairs or battery replacement. Be sure to back up all important data on other media (computer) to protect against its loss.

Device Intended Purpose

The device is a speech generating device that augments communication for an individual with speech/language impairment. This device and its language programs give the user the ability to initiate conversation, seek information, state opinions, and share feelings. Depending on the model, it can be hand-held, used with a table stand, or mounted to a wheelchair; and can be accessed by using the touchscreen, an available eye tracking system or head tracking system, or a variety of available switch accessories. The device does not incorporate in any way medicinal substances, human blood or plasma derivatives, nor is it manufactured using tissues of animal origin.

Indications and Contraindications

Indication: The device is a speech generating device that augments communication for an individual with speech/language impairment.

Contraindication: This device is not intended to be an emergency call device or sole communication aid.

Existing Application Risks

No existing application risks are known.

Expected Service Life

The expected service life of the device, battery charger, and accessories is five years. If you dispose of your device, battery charger, or accessories, please dispose of them in accordance with your local, state, and/or country electronic recycling laws.

Intended Operators

The individual using the device to communicate, the individual’s communication partner, and/or the person changing device settings, maintaining software files, etc., are the intended operators of the device. The pictures and text in the manual will help these operators achieve the intended use of the device.

Expected Position of Operators

In normal use, the device is expected to be within 12 to 14 inches of the individual’s body. The distance will vary according to whether the device is hand-held or mounted on a wheelchair or table.

Special Skills, Training, or Knowledge Required

No special skills or training are required to operate or maintain the device. The pictures and text in this document will help the operators acquire the knowledge to achieve the intended use of the device.

Instructions for Use

  • All functions of the device are safe for use by the user. For best results, follow the instructions in the manual.

  • There is no need to turn the device or amplifier off when using the device on a daily basis. It is recommended to restart the device once per week and put it to sleep daily.

  • To report any serious incident associated with the device, contact PRC-Saltillo and your national authority. For information on cleaning, see the user manual.

Instructions for Storage

If you will be leaving the device in storage for a long period of time, turn the device and amplifier off. Devices in storage must be charged every six months.


Software Compliance

Wireless Communications Equipment

Wireless communications equipment such as wireless home network devices, mobile phones, cordless telephones and their base stations, and walkie-talkies can affect the device running the software and should be kept at least six (6) inches away from the device.

Limitation of Intended Use, Third Parties, and Data Loss

  • PRC-Saltillo does not warrant any functionality of the software outside the terms of its express warranty relating to the intended use of speech generation. PRC-Saltillo does not warrant any third-party software, nor is it responsible for any injury, damage or claims arising from the function or malfunction of any third-party technology, websites, products, and software. Additional uses may require further clinical determinations beyond the scope of an evaluation for speech generation devices.

  • PRC-Saltillo assumes no responsibility for any loss or claims by third parties which may arise through the use of this software.

  • PRC-Saltillo assumes no responsibility for any damage or loss caused by the deletion of data as a result of software malfunction. Be sure to back up all important data on other media (a computer, for example) to protect against its loss.

Software Intended Purpose

The software augments communication for an individual with speech/language impairment. The language programs give the user the ability to initiate conversation, seek information, state opinions, and share feelings. The software is accessed by using a touchscreen, eye tracking module, head tracking module, or a variety of available switch accessories.

Indications and Contraindications

Indication: The software augments communication for an individual with speech/language impairment.

Contraindication: The software is not intended for emergency calls or as a sole communication aid.

Existing Application Risks

No existing application risks are known.

Expected Service Life

Software is updated continually. Service life is dependent on the hardware on which it runs.

Intended Operators

The individual using the software to communicate, the individual’s communication partner, and/or the person changing software settings, maintaining software files, etc. are the intended operators of the device.

Special Skills, Training, or Knowledge Required

No special skills or training are required to use the software.

Instructions for Use

  • All functions of the software are safe for use by the user. For best results, follow the instructions in this manual.

  • To report any serious incident associated with the software, contact PRC-Saltillo and your national authority.


Contact Information for Help

If you need assistance in setting up or using the software or if you need to report unexpected operation of the software or an unexpected event related to it, please contact us at 800.262.1984 or service@prc-saltillo.com.

International Contact Information

Manufacturer

Prentke Romich Company

1022 Heyl Rd

Wooster, OH 44691

USA

Tel.: +1 330 262-1984 · +1 800 262-1984

Fax: +1 330 262-4829

info@prentrom.com

prc-saltillo.com/


EU Authorised Representative

Prentke Romich GmbH

Karthäuserstr. 3

D-34117 Kassel

Germany

Tel.: +49 (0) 561 7 85 59-0

Fax: +49 (0) 561 7 85 59-29

info@prentke-romich.de

prentke-romich.de/


EU Importer

Prentke Romich GmbH

Karthäuserstr. 3

D-34117 Kassel

Germany

Tel.: +49 (0) 561 7 85 59-0

Fax: +49 (0) 561 7 85 59-29

info@prentke-romich.de

prentke-romich.de/


UK Responsible Person and Importer

Liberator Ltd

Glenside Business Park

West Pinchbeck, Spalding, Lincolnshire

PE11 3SA

United Kingdom

Tel.: +44 (0) 1733 370 470

Fax: +44 (0) 1476 552 473

info@liberator.co.uk

liberator.co.uk/


Authorised Representative in Australia

Liberator Pty Ltd

Suite 1.02, Level 1, 8 Parkview Drive

Sydney Olympic Park NSW 2127

Australia

Tel.: +61 (0) 8 8211 7766

info@liberator.net.au

liberator.net.au/


Swiss Authorized Representative

Inspera GmbH

Thunstrasse 64 | CH-3110 Münsingen

Switzerland

Tel.: +41 31 819 74 60

Mobile: +41 79 435 53 09

info@liberator.net.au

inspera.ch/


Swiss Importer

Active Communication AG

Sumpfstrasse 28 | CH-6312 Steinhausen

Switzerland

paraplegie.ch/activecommunication/de/

Copyright and Trademarks

United States

©2026 PRC-Saltillo. Non-commercial reprint rights for clinical or personal use granted with inclusion of copyright notice. Commercial use prohibited; may not be used for resale. Contact PRC-Saltillo for questions regarding permissible uses.

AAC Language Lab®, AAC Learning Journey®, Accent®, AeroSwitch®, AeroText™, ChatEditor™, ChatFusion™, ChatPoint™, ChatSMS®, ChatWrap®, Coaching Corner®, CoreScanner™, Dialogue® AAC, Empower®, Engage®, Essence®, Freedom Switch™, iShare®, iSharePRC®, iShareWFL®, iSurround®, LAMP™, LAMP Words for Life®, Look®, Minspeak®, NovaChat®, NuEye®, NuPoint®, NuVoice®, PASS™, Pixon®, PRC-Saltillo®, PRiO®, Realize Language™, Semantic Compaction®, Timocco-on-Accent™, TouchChat®, Unidad®, Unity®, Unity® AAC, VersaChat®, VersaEye®, VersaSpeaker®, VersaWrap®, Via®, VocabPC™, and Xtreme™ are trademarks of PRC-Saltillo.

Australia

AAC Learning Journey™, Accent™, ChatSMS®, Coaching Corner®, Dialogue™, Empower™, Engage™, LAMP Wods for Life®, Liberator Rugged®, Minspeak™, Nova Chat®, NovaRugged®, Semantic Compaction®, TouchChat®, Unity™, VersaEye®, VersaSpeaker®, VersaWrap®, Via™

Canada

AAC Language Lab™, AAC Learning Journey®, Accent™, Coaching Corner®, Dialogue® AAC, Empower®, Engage®, LAMP Words for Life®, Minspeak®, NovaChat®, PRC-Saltillo®, Semantic Compaction®, TouchChat®, Unity®, VersaEye®, VersaSpeaker®, VersaWrap®, Via®

European Union

AAC Language Lab™, AAC Learning Journey®, Accent®, AeroSwitch™, Coaching Corner®, Dialogue™, Empower®, Engage®, LAMP Words for Life®, Look™, Minspeak®, Nova Chat®, PRC-Saltillo™, Semantic Compaction®, TouchChat®, Unity ™, VersaEye®, VersaSpeaker®, VersaWrap®, Via®

Germany

Accent®, AeroSwitch™, ChatSMS™, Eloquence™, Empower®, Engage™, LoGoFoXX®, LAMP Words for Life™, Look™, Minspeak®, MultiFoXX®, NovaChat™, Quasselkiste™, RehaFoXX®, Via®, WORTSTRATEGIE®

Singapore

AAC Language Lab®, AAC Learning Journey®, Accent™, Coaching Corner™, Dialogue™, Empower™, Engage™, LAMP Words for Life®, Minspeak®, NovaChat®, PRC-Saltilo™, Semantic Compaction®, TouchChat®

United Kingdom

AAC Coaching Corner®, AAC Language Lab®, AAC Learning Journey®, Accent®, AeroSwitch™, ChatSMS®, Coaching Corner™, Dialogue® AAC, EasyChat®, Empower®, Engage®, Essence®, iShare-PRC™, LAMP Words for Life®, Liberator® (logo), Liberator Rugged™, Libswitch™, Look™, Minspeak®, NovaChat®, NuPoint™, NuVoice™, Pixon®, PRC-Saltillo®, Semantic Compaction®, TouchChat®, Unidad®, Unity®, VersaEye®, VersaSpeaker®, VersaWrap®, Via®

Third Parties

Acapela Group® and my-own-voice™ are trademarks of Acapela Group. Acapela Group, Copyright 2026. All rights reserved. Used with permission. The Acapela text to speech technology and the synthetic voices contained in this software are included free of charge for the usage by the end user but may be used solely for communication purposes and may not be sold, copied or otherwise exploited for any type of profit.

AirDrop®, App Store®, Apple®, Apple Books®, FaceTime®, Guided Access®, iCloud®, iPad®, iPad Air®, iPad mini®, iPadOS®, iPad Pro®, iPhone®, iPod®, iTunes®, Lightning®, Mac®, Macintosh®, Safari®, Siri®, TouchID®, and TrueDepth® are trademarks of Apple Inc., registered in the U.S. and other countries and regions.

The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by PRC-Saltillo is under license.

CAVIWIPES™ is a trademark of Metrex Research LLC.

Dropbox® is a registered trademark of Dropbox, Inc.

Google™, Google Docs™, Google Drive™, Google Play™, Android™, Chromebook™, Gmail™, and YouTube™ are trademarks of Google Inc.

Intel®, the Intel logo, Intel® Core™, and Celeron® are trademarks of Intel Corporation or its subsidiaries.

iOS® is a trademark or registered trademark of Cisco in the U.S. and other countries and is used under license.

Ivona is supplied by ReadSpeaker.

Mac® is a trademark of Apple Inc., registered in the U.S. and other countries and regions.

Microsoft® and Windows® are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries.

My QuickChat™ is copyright of Talk To Me Technologies.

Netflix® is a trademark of Netflix, Inc.

PCS® is a trademark of Tobii Dynavox LLC. All rights reserved. Used with permission.

Samsung® and Galaxy Tab® are registered trademarks of Samsung Electronics America, Inc.

The symbols used in this work are owned by n2y, LLC. Used with permission under license. © 2026.

TIK TOK is a trademark of Bytedance Ltd.

Velcro® is a registered trademark of Velcro BVBA.

VocaliD™ is a trademark of VocaliD, Inc.

The Voice Keeper and Almagu voices are intellectual property of Almagu.

WHATSAPP is a trademark of WHATSAPP LLC.

Wi-Fi® is a registered trademark of Wi-Fi Alliance.

Windex® is a registered trademark of S. C. Johnson & Son, Inc.

WordPower® is a trademark of Inman Innovations, Inc. © 2001-2026; All rights reserved. Used with permission.

Other trademarks are the property of their respective owners.

Specifications - Accent 800-40

Classifications

Electrical shock protection: Class II / internally powered

Ingress protection rating: IP22

Mode of operation: Continuous

Type of applied part: BF

Specifications

Weight: 2.5 lbs.

Dimensions: 9 in. x 5.9 in. X 1.5 in.

Display: 8 in. diagonally, screen resolution 1920 x 1200 dpi with LCD IPS

Battery life: 8 to 9 hours depending on individual usage and power settings

Memory: 8 GB

Storage: 256 GB

Processor: Intel® Celeron® N5100

Operating system: Microsoft® Windows® 11 Pro

Charger: The following charger is compatible with the device: Megmeet MANGO60S-18BB-PRC (available from PRC-Saltillo). Only use this charger to charge the device.

Standard components: Frame, handle, stand, battery charger, USB flash drive, stylus

Accessories: Carry case, standard and deluxe carry straps, screen protectors, external power pack, QRM mounting plate, device mounting brackets, keyguards, TouchGuides, replacement frame, an extra rugged Xtreme™ case, head tracking module

Operating Environment

Note: The device needs to be protected from moisture during use.

Ambient temperature: 0°C to 40°C (32°F to 104°F)

Relative humidity: 10% to 90%

Atmospheric pressure: 80 kPa to 106 kPa

Transport and Storage Environment

While in transport or storage, the range of temperatures to which the device can be exposed is -20°C to 60°C (-4°F to 140°F), with an atmospheric pressure range of 80 kPa to 106 kPa.

Conditions for Safe Contact – Time

Maximum safe contact time for each accessible part while the device is in use (ambient temperature 40°C or 104°F)

Touchscreen: Less than 1 minute

Power button: Less than 1 minute

Volume button: Less than 1 minute

Conditions for Safe Contact – Temperature

Maximum safe temperature for each accessible part while the device is in use (ambient temperature 40°C or 104°F)

Touchscreen: 54.3°C (129.74°F)

Power button: 50.5°C (122.9°F)

Volume button: 41.2°C (106,.16°F)

⚠️ While the device is charging, touching the surface of the device with broken skin may aggravate a wound.

⚠️ While the device is charging, infants or high-risk groups should not touch the surface of the device if there is a chance of burning the skin.