FCC ID: 2AT97W1K Pocket Unit

Owners Manual Welcome to Whisper 3 4 5 7 What is included Troubleshooting The Whisper Brain lights Loss or damage How it works Potential side effects, cautions, and warnings Getting started Technical data 23 26 29 39 18 Maintenance 2 What is included Left and right earpieces The Whisper Brain The Whisper Brain charger and USB cable Earpiece carrying case Earpiece cleaning tool Extra wax guards Owners manual 3

The Whisper Brain lights Brain is off Off Brain is turning on Pulsing Peach Brain is on Solid Peach Charging while off Charging while on Pulsing Red when charging, Pulsing Green once charged Solid Red when charging, Solid Green once charged 4 How it works 5 Meet your new Whisper Hearing System, the learning hearing aid that gets better over time. With Whisper, youll receive regular software upgrades containing new features and improved sound processing every few months. The Whisper Hearing System has earpieces like a traditional hearing aid, but what makes it unique is the power and intelligence of the Whisper Brain. The Whisper Brain is powered by a proprietary Sound Separation Engine that optimizes sound in real-time. Your earpieces will work even if the Brain is not nearby, but you wont experience the full benets of the Whisper Hearing System without it. 6 Getting started 7 1. Charging the Brain Charge the Brain every day before use. To charge, insert the small end of the charging cable into the Brain, and the other end into the wall charger. Plug the charger into an outlet. A complete charge may take up to ve hours. 2. Turning the Brain on and off The Brain can be turned on or off by pressing and holding the Settings button. The Brain should be on to get the full bene t of the Whisper Hearing System, and to use the volume and settings controls. Typically you will not need to turn the Brain off. It will automatically turn off when not in use. 8 3. Turning the earpieces on Each Whisper Hearing System comes with two earpieces, powered by a 675 hearing aid battery. Before inserting the battery into the earpiece, remove the protective lm and allow it to sit for 3-5 minutes to extend the battery life.

Carefully pull on the tab at the Place the battery into the tray bottom of the battery tray so it opens. with its positive side visible. The earpiece will automatically turn on once the tray is closed. 9 WARNING If you or someone you know has swallowed a battery, call the Battery Ingestion Hotline immediately: 800-498-8666. Keep out of reach of children at all times, particularly when storing overnight with battery doors open. Accidental ingestion of batteries can be fatal or life-threatening. Batteries can be harmful or fatal if swallowed. Always keep earpieces and batteries out of the reach of children. Always use a size 675 hearing aid battery with your Whisper Hearing System to prevent damage to your device. Always dispose of batteries safely, and in accordance with local laws. When not in use, earpieces should be stored in the provided case with the battery doors open to prolong battery life. 10 4. Putting the earpieces on Be sure to wear the correct earpiece in each ear. The right earpiece has a red tip, and the left, a blue tip. When the earpiece is powered on, a recording will play to identify which earpiece is which

(left or right). Gently insert the domed tip at the end of the speaker wire into your ear canal, wrapping the remainder of the wire around 11 the top of your ear so that the earpiece body sits comfortably behind your ear. Do not insert the speaker wire into your ear if it does not have a dome, or if the dome is damaged. For added stability, ask your hearing care professional for motion locks. LEFT RIGHT 12 WARNING The earpieces are made of modern nonallergenic materials. Nonetheless, in rare cases, skin irritation may occur. If you notice skin irritation in or around your ear or ear canal, suspend use and contact your hearing care professional. In the unlikely event that the silicone dome separates from the earpiece and remains in your ear canal, seek immediate help from a hearing care or medical professional. Do not try to remove the dome on your own as doing so risks damage to your ears. 13 5. Adjusting volume With the Whisper Brain turned on, press the Volume buttons to change volume. Every time you increase or decrease the volume, a short sound will play to con rm the level. 14 6. Adjusting settings Press the Settings button to switch between the Dynamic and Custom settings. The Dynamic setting will automatically adjust sound for everyday comfort. The Custom setting can be con gured to optimize for different situations. Your hearing care professional can con gure the Custom setting, or you can con gure it using the Whisper mobile app. 15 Music Quiet Noise Outdoors TV 7. Taking the earpieces off WARNING To take the earpieces off, pull the earpiece body off your ear and gently pull on the wire near the speaker to remove the ear tip. Clean and inspect your earpieces after each use to check that they are intact. Regular use of a hearing aid dehumidier is recommended. When using any type of earpiece, you should regularly ventilate your ear, otherwise your ear canal will have a slightly increased risk of infection or disease. Remove your earpieces when you sleep for ventilation. 16 8. Turning the earpieces off To preserve battery life, open the earpiece battery trays when not in use. The battery is not rechargeable and will need to be replaced every few days. Once the battery is low, the earpiece will play a low battery indicator. 17 Maintenance 1. Battery maintenance 2. Cleaning the earpieces Turn the earpieces off whenever they are not in use. Make sure the Brain is fully recharged at least once a day. Use a dry microber cloth to wipe down the earpieces; for more intensive cleaning needs, consult your hearing care professional. Do not use liquid (including water), alcohol, or chlorine-based cleaners, as they may cause damage. 18 3. Removing wax buildup 4. Replacing the wax guards The Whisper Hearing System includes a small brush to clean wax off the earpieces. Gently brush wax off the domes, away from the speaker opening. Then use a soft, dry cloth to wipe the body of the earpiece. The wax guard is a small white piece of plastic that sits under the dome to protect the speaker. If the wax guard becomes damaged or clogged, replace it with one of the extra guards provided with your Whisper Hearing System. Contact your hearing care professional for instructions. 19 5. Dome replacement 6. Avoiding damage Promptly replace domes every 3 months or if discolored or clogged. Please avoid subjecting your Whisper Hearing System to adverse conditions, including dropping it, immersing it in water or other liquids, or exposing it to extreme temperatures. 20 Do not expose your Whisper Hearing System to temperatures below

-20C/-4F or above 45C/113F, or to environments above 90% relative humidity. Avoid using the Whisper Hearing System in temperatures below 0C/32F or above 35C/95F. Do not drop any part of your Whisper Hearing System, as it may damage Never try to open or repair any part of the Whisper Hearing System WARNING the device. yourself. 21 Do not shower, bathe, or swim with your earpieces or immerse them in water or other liquids. Although the earpieces are waterproof up to a depth of 1 meter (IP68), they can still be damaged by immersion. Should your earpieces come into contact with water and stop working, please follow these guidelines:

1) Gently wipe off any water. 2) Open the battery compartment, remove the battery, and gently wipe off any water in the battery compartment. 3) Let the earpieces dry with the battery compartment open. 4) Insert a new battery into the earpiece. The Whisper Brain is not water resistant and should be kept away from moisture and dust. 22 Trouble-

shooting No Sound Possible cause Solution The earpiece battery tray is not closed Close the battery tray The earpiece battery is dead Replace the battery The earpiece is clogged Clean the wax guard or replace the dome 23 Intermittent sound Possible cause Solution Clogged sound outlet Clean the wax guard or replace the dome Moisture Clean and wipe the battery with a dry cloth 24 Squealing noise Possible cause Solution The earpiece is inserted incorrectly Remove and re-insert the earpiece Earwax accumulated in the ear canal Contact your hearing care professional If none of the solutions in this chapter work, please consult your hearing care professional. 25 Blinking status light Possible cause Solution The Whisper Brain needs to be recharged Recharge the Whisper Brain Loss or damage If you have misplaced or lost or damaged any part of the Whisper Hearing System, please contact your hearing care professional. 26 Caution: Federal law restricts this device to sale by or on the order of an audiologist or hearing care professional. The Whisper Hearing System is designed for daily use, and has been adjusted specically for you, the original owner, by your hearing care professional. It should be used only as directed, and not used by others. Note: The Whisper Hearing System is intended to improve hearing for adults with mild to severe hearing loss. No hearing aid will restore normal hearing or prevent or improve a hearing impairment resulting from organic conditions. In most cases, infrequent use of a hearing aid does not permit a user to attain full benet. A hearing aid is only part of hearing rehabilitation and may need to be supplemented by auditory training and lip reading. 27 WARNING To avoid injury or damage to your Whisper Hearing System, please review these instructions and follow all warnings and instructions for use. The Whisper Hearing System is intended for adults only. Consult a physician, audiologist, or other hearing care specialist to determine if the Whisper Hearing System is appropriate for your type of hearing loss. The Whisper Hearing System is not intended for use by children. The Whisper Hearing System is not for use by those with profound hearing loss and must be issued by an audiologist or other hearing care professional. The Whisper Hearing System is not intended for use by those without hearing loss. 28 Never allow others to wear your Whisper Hearing System, as this could cause permanent damage to their hearing. Do not use or wear your Whisper Hearing System during radiation, X-rays, MRIs, CT or other medical treatments and scans. Potential Side Effects Earpieces may cause an accelerated accumulation of earwax, skin irritation, or infection. Please contact a hearing care professional should any of these conditions occur. 29 WARNING The following guidelines are recommended for those with debrillators, pacemakers, and other medical implants while using the Whisper Hearing System. If you wear an active implantable device, keep all Whisper Hearing System parts (including the multi-tool magnet) at least 15 cm away from the implant. If you experience any interference, do not use the earpieces and contact the manufacturer of the implant. Please note that interference can also be caused by power lines, electrostatic discharge, airport metal detectors, etc. If you have an active brain implant, please contact the manufacturer of the implant for risk evaluation. 30 WARNING explosive gases. Do not use the Whisper Hearing System in mines or other areas with Although your earpiece has been designed to comply with the most stringent international electromagnetic compatibility standards, it may cause interference with other equipment, such as medical devices. Warning to Hearing Care Professionals An audiologist or hearing care professional should advise a prospective hearing aid user to consult promptly with a licensed physician (preferably an ear specialist) before dispensing a hearing aid if the hearing aid dispenser determines through inquiry, actual observation, or review of any other 31 available information concerning the prospective user, that the prospective user has any of the following conditions:

Visible congenital or traumatic deformity of the ear. History of active drainage from the ear within the previous 90 days. History of sudden or rapidly progressive hearing loss within the previous Acute or chronic dizziness. 90 days. days. Unilateral hearing loss of sudden or recent onset within the previous 90 Audiometric air-bone gap equal to or greater than 15 decibels at 500 hertz (Hz), 1,000 Hz, and 2,000 Hz. 32 Visible evidence of signicant cerumen accumulation or a foreign body in the ear canal. Pain or discomfort in the ear. Special care should be exercised in selecting and tting a hearing aid whose maximum sound pressure level exceeds 132 decibels because there may be risk of impairing the remaining hearing of the hearing aid user. Important Notice for Prospective Hearing Aid Users Good health practice requires that a person with a hearing loss have a medical evaluation by a licensed physician (preferably a physician who specializes in diseases of the ear) before purchasing a hearing aid. Licensed physicians who specialize in diseases of the ear are often referred to as otolaryngologists, otologists or otorhinolaryngologists. 33 The purpose of medical evaluation is to ensure that all medically treatable conditions that may affect hearing are identied and treated before the hearing aid is purchased. Following the medical evaluation, the physician will give you a written statement that states that your hearing loss has been medically evaluated and that you may be considered a candidate for a hearing aid. The physician will refer you to an audiologist or a hearing aid dispenser, as appropriate, for a hearing aid evaluation. The audiologist or hearing aid dispenser will conduct a hearing aid evaluation to assess your ability to hear with and without a hearing aid. The hearing aid evaluation will enable the audiologist or dispenser to select and t a hearing aid to your individual needs. 34 If you have reservations about your ability to adapt to amplication, you should inquire about the availability of a trial-rental or purchase-option program. Many hearing aid dispensers now offer programs that permit you to wear a hearing aid for a period of time for a nominal fee after which you may decide if you want to purchase the hearing aid. Federal law restricts the sale of hearing aids to those individuals who have obtained a medical evaluation from a licensed physician. Federal law permits a fully informed adult to sign a waiver statement declining the medical evaluation for religious or personal beliefs that preclude consultation with a physician. The exercise of such a waiver is not in your best health interest and its use is strongly discouraged. 35 Children with Hearing Loss In addition to seeing a physician for a medical evaluation, a child with hearing loss should be directed to an audiologist for evaluation and rehabilitation since hearing loss may cause problems in language development and the educational and social growth of a child. An audiologist is qualied by training and experience to assist in the evaluation and rehabilitation of a child with a hearing loss. The Whisper Hearing System is not intended for use by children. FCC Notices The earpieces are under FCC ID 2AT97W1C. The Whisper Brain is under FCC ID 2AT97W1K and contains FCC ID 2AFDI-ITCNFA324. 36 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. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. 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 radio communications. However, there is no guarantee that interference will not occur in a particular installation. If 37 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. This hearing aid complies with international standards concerning electromagnetic compatibility and human exposure. The Whisper Hearing System has been tested at an altitude of 5,000 meters with an atmospheric pressure of 55kpa. 38 Technical Data Data in accordance with ANSI S3.22-2014 HFA-OSPL90 117 dB SPL Test HFA-FOG RTG 50 dB 45 dB Frequency Range 250 Hz - 7000 Hz 39 Test THD EIN 2.5%

28 dB SPL Battery Current 5.5 mA Attack and Release Time Attack between 5 and 20 msec;

release time between 15 and 30 msec 40 Figure 1. Figure 2.

L P S B d

l e v e L 0 9 L P S O 130 120 110 100 90 80 70 41

L P S B d

l e v e L t u p t u O e s n o p s e R y c n e u q e r F 130 120 110 100 90 80 70 125 250 500 1k 2k 3k 4k 6k 8k 125 250 500 1k 2k 3k 4k 6k 8k Frequency [Hz]

Frequency [Hz]

For the most up to date information, please visit www.whisper.ai/support. 2020 Whisper.ai, Inc. LBL-0047A

09-18-2020 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD FCC Agent Authorization Letter Applicant Model Name/Number(s) FCC ID Whisper.AI Inc Whisper Brain 2AT97W1K We, the undersigned, hereby authorize HCT America Inc. to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by HCT America Inc. on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). We recognize that we are still responsible for the terms and conditions outlined in the HCT America Client Services Agreement. This authorization is valid until further written notice from the applicant. Sincerely, Raymond Lee Head of Regulatory and Quality Whisper.AI Inc 260 8th Street San Francisco, CA 94103, U.S.A. HCT America Inc. 1726 Ringwood Avenue San Jose, CA 95131 TEL:

+1.510.933.8848 || Fax: +1.510.933.8849 Page 1 of 1 DocuSign Envelope ID: F48CEA23-7055-473E-BECF-A823B7C7B633

09-18-2020 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD Request for Confidentiality We hereby request confidential treatment of information accompanying this application as outlined below:

Applicant Model Name/Number(s) FCC ID Whisper.AI Inc Whisper Brain 2AT97W1K Long-Term Confidentiality Block Diagram Schematics Operational Description Short-Term Confidentiality Internal Photos External Photos Test Set-Up Photos The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. We would like request to hold documents listed under Short-Term Confidentiality to remain confidential up to 180 days. Sincerely, Raymond Lee Head of Regulatory and Quality Whisper.AI Inc 260 8th Street San Francisco, CA 94103, U.S.A. HCT America Inc. 1726 Ringwood Avenue San Jose, CA 95131 TEL:

+1.510.933.8848 || Fax: +1.510.933.8849 Page 1 of 1 DocuSign Envelope ID: F48CEA23-7055-473E-BECF-A823B7C7B633