IPH-04448Portable Transceiver for general public use

IMPORTANT SAFETY AND PRODUCT INFORMATION WARNING Failure to heed the following warnings could result in an accident or medical event resulting in death or serious injury. Dive Warnings •The diving features of this device are for use by certified divers only. This device should not be used as a sole dive computer. Failure to input the appropriate dive-related information into the device can lead to serious personal injury or death. •Make sure that you fully understand the use, displays, and limitations of your device. If you have questions about this manual or the device, always resolve any discrepancies or confusion before diving with the device. Always remember that you are responsible for your own safety. •There is always a risk of decompression illness (DCI) for any dive profile even if you follow the dive plan provided by the dive tables or a diving device. No procedure, diving device, or dive table will eliminate the possibility of DCI or oxygen toxicity. An individual's physiological make up can vary from day to day. This device cannot account for these variations. You are strongly advised to remain well within the limits provided by this device to minimize the risk of DCI. You should consult a physician regarding your fitness before diving. •This device can calculate decompression stop requirements. These calculations are at best an estimate of the real physiological decompression requirements. Dives requiring staged decompression are substantially more risky than dives that stay well within no-stop limits. Diving with rebreathers, diving with mixed gases, performing staged decompression dives, and diving in overhead environments greatly increases your risk while scuba diving. •The transmitter uses sonar technology to communicate with paired devices underwater. Signals can be lost if there are large objects or obstructions between paired devices when diving in groups. Each diver should always use their own transmitter paired to their own dive computer to ensure better connectivity between the transmitter and dive computer. •The dive computer can calculate your surface air consumption rate (SAC) and air time remaining (ATR). These calculations are an estimate and should not be relied on as the only source of information. •If you have a pacemaker or other implantable medical device, consult your physician before you dive. Scuba diving creates physical stresses on the body, which may not be suitable for individuals with pacemakers and other implantable medical devices. •Always use backup instruments, including a depth gauge, submersible pressure gauge, and timer or watch. You should have access to decompression tables when diving with this device. •Use a wrench when installing the transmitter on your tank regulator. Do not overtighten. Do not use the transmitter housing to tighten the transmitter. •Do not grip the regulator or the transmitter to move, carry, or adjust the air tank. •Perform pre-dive safety checks, such as checking proper device function and settings, display function, battery level, tank pressure, and bubble checks to check hoses for leaks. •Confirm the dive computer is receiving a signal from the transmitter prior to starting your dive. The pressure value and battery level should appear on the dive computer screen. Each diver is responsible for their own safety and tank pressure. •Check your device regularly during a dive. If there is any apparent malfunction, terminate the dive immediately and safely return to the surface. •If the dive computer receives no signal from the transmitter, the pressure value is replaced by "NO COMMS." Check the position of the transmitter relative to the dive computer, and change the position as needed to acquire a signal. If a signal is not acquired, terminate the dive immediately and safely return to the surface. •If a tank pressure warning or battery warning appears on the dive computer, terminate the dive immediately and safely return to the surface. Disregarding the alarm may result in serious injury or death. •This device should not be shared between multiple users for diving purposes. Diver profiles are user specific, and using another diver's profile can result in misleading information that could lead to injury or death. •For safety reasons, you should never dive alone. Dive with a designated buddy. You should also stay with others for an extended time after a dive, because the potential onset of decompression illness (DCI) may be delayed or triggered by surface activities. •This device is not intended for commercial or professional dive activities. It is for recreational purposes only. Commercial or professional dive activities can expose the user to extreme depths or conditions that increase the risk of DCI. •Do not dive with a gas if you have not personally verified its contents and input the analyzed value to the device. Failure to verify tank contents and input the appropriate gas values to the device will result in incorrect dive planning information and could result in serious injury or death. •Diving with more than one gas mixture presents a much greater risk than diving with a single gas mixture. Mistakes related to the use of multiple gas mixtures may lead to serious injury or death. •After analyzing your gas, always round down the result when inputting it to the device. For example, if the analyzed gas is 31.7% oxygen, input the gas as 31%. This buffer will result in more conservative and safer calculations. •The transmitter is not an oxygen cleaned product. Do not use the transmitter with anything greater than 40% oxygen. •Diving with a partial pressure of oxygen (PO2) greater than 1.6, a central nervous system (CNS) oxygen toxicity exposure of 80% or greater, or daily oxygen tolerance units (OTU) of 300 or greater can be hazardous, and could result in serious injury or death. Terminate the dive if you reach oxygen toxicity levels. •Always ensure a safe ascent. A rapid ascent increases the risk of DCI. •Disabling th…

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DESCENT ™ MK3 51mm(Model:A04448) / MK3S 43mm(Model:AA4448) Owner’s Manual © 2020 Garmin Ltd. or its subsidiaries All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Garmin. Garmin reserves the right to change or improve its products and to make changes in the content of this manual without obligation to notify any person or organization of such changes or improvements. Go to www.garmin.com for current updates and supplemental information concerning the use of this product. Garmin ® , the Garmin logo, ANT ® , ANT+ ® , Approach ® , Auto Lap ® , Auto Pause ® , Edge ® , inReach ® , QuickFit ® , TracBack ® , VIRB ® , Virtual Partner ® , and Xero ® are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. Descent ™ , Body Battery ™ , Connect IQ ™ , Firstbeat Analytics ™ , Garmin Connect ™ , Garmin Dive ™ , Garmin Explore ™ , Garmin Express ™ , Garmin Golf ™ , Garmin Index ™ , Garmin Move IQ ™ , Garmin Pay ™ , HRM-Pro ™ , HRM-Run ™ , HRM-Swim ™ , HRM-Tri ™ , Rally ™ , tempe ™ , TruSwing ™ , TrueUp ™ , Varia ™ , and Vector ™ are trademarks of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin. Android ™ is a trademark of Google LLC. Apple ® , iPhone ® , iTunes ® , and Mac ® are trademarks of Apple Inc., registered in the U.S. and other countries. The BLUETOOTH ® word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by Garmin is under license. The Cooper Institute ® , as well as any related trademarks, are the property of The Cooper Institute. Di2 ™ is a trademark of Shimano, Inc. Shimano ® is a registered trademark of Shimano, Inc. iOS ® is a registered trademark of Cisco Systems, Inc. used under license by Apple Inc. The Spotify ® software is subject to third-party licenses found here: https://developer.spotify.com/legal/third-party-licenses. STRAVA and Strava ™ are trademarks of Strava, Inc. Training Stress Score ™ (TSS), Intensity Factor ™ (IF), and Normalized Power ™ (NP) are trademarks of Peaksware, LLC. Wi‑Fi ® is a registered mark of Wi-Fi Alliance Corporation. Windows ® is a registered trademark of Microsoft Corporation in the United States and other countries. Zwift ™ is a trademark of Zwift, Inc. Other trademarks and trade names are those of their respective owners. This product is ANT+ ® certified. Visit www.thisisant.com/directory for a list of compatible products and apps. Table of Contents i Table of Contents Introduction ...........................................1 Getting Started ........................................... 1 Buttons .................................................... 1 Using the Watch ..................................... 2 Viewing the Controls Menu .............. 2 Viewing Widgets ................................ 3 Customizing the Watch ........................ 3 Default Watch Face ............................... 4 Pairing Your Smartphone.......................... 4 Charging the Watch ................................... 5 Product Updates ........................................ 5 Setting Up Garmin Express .................. 5 Diving .......................................................6 Dive Warnings ............................................ 6 Dive Modes ................................................. 7 Using the Pool Dive Mode ..................... 7 Dive Setup ................................................... 8 Setting Up Your Breathing Gases ........ 9 Custom Dive Alerts ................................ 9 Setting a Custom Dive Alert ........... 10 Setting PO2 Thresholds ....................... 10 Setting CCR Setpoints .......................... 11 No-Fly Time ........................................... 11 Dive Data Screens ................................... 11 Single-Gas and Multi-Gas Data Screens ................................................. 12 CCR Data Screens ................................ 13 Gauge Data Screens ............................ 14 Apnea Data Screens ............................ 15 Apnea Hunt Data Screens .................. 16 Going Diving ............................................. 17 Navigating with the Dive Compass ... 18 Using the Gauge Dive Stopwatch ....... 19 Using the Basic Dive Stopwatch ........ 19 Switching Gases During a Dive .......... 19 Switching Between CC and OC Diving for a Bailout Procedure ....................... 20 Performing a Safety Stop .................... 20 Performing a Decompression Stop ... 21 Diving with the Map ............................. 21 Viewing the Surface Interval Widget ..... 22 Viewing the Dive Log Widget ................. 22 Dive Planning ............................................ 22 Calculating NDL Time ......................... 23 Calculating Your Breathing Gas ........ 23 Creating a Decompression Plan ....... 24 Using Decompression Plans ............. 24 Altitude Diving ......................................... 24 Tips for Wearing the Device with an Exposure Suit ........................................... 24 Dive Alerts ................................................ 25 Dive Terminology ..................................... 27 Activities and Apps ............................. 27 Starting an Activity .................................. 27 Tips for Recording Activities .............. 27 Changing the Power Mode................. 28 Playing Audio Prompts During an Activity .................................................. 28 Using the Metronome ......................... 28 Stopping an Activity ................................ 29 Evaluating an Activity .............................. 29 Adding or Removing a Favorite Activity ...................................................... 29 Creating a Custom Activity ..................... 30 Indoor Activities ....................................... 30 Going for a Virtual Run ....................... 30 Calibrating the Treadmill Distance ... 30 Record…

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Rev 1/26/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 15, 2023 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: IPH-04448 Garmin International, Inc., (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as an specifically named entity or any of its subsidiaries or affiliates) as an producing “covered” equipment. Sincerely, Ben Karsak

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 09-15-2023 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID: IPH-04448 Garmin International, Inc., Garmin certifies that, as of the date of t he filing of the application, Garmin International, Inc. is our designated U.S. agent for service of process for t he above referenced FCC ID. Garmin International, Inc., accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or t he conclusion of any Commission-related proceeding involving the equipment. Garmin International, Inc. accepts, as of the date of t he filing of the application, the obligation of the designated U.S. agent for service of process for t he above referenced FCC ID. Designated U.S. Agent Information: FRN: 0005088588 Name: Garmin International, Inc. Address: 1200 East 151 st Street, Olathe, Kansas, 66062 Contact Person: Ben Karsak Tel.: 913-440-1946 Email: [email protected] Sincerely, Garmin International, Inc. Ben Karsak

Rev 1/26/2023 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: September 15, 2023 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: IPH-04448 Garmin International, Inc., (“ the applicant”) certifies that the equipment for which authorization is sought i s not “covered” equipment prohibited from receivin g an equipment authorization pursuant to section 2.903 of the FCC rules. Sincerely, Ben Karsak

Page 1 of 1 Request for Confidentiality Date: October 2, 2023 Subject: Confidentiality Request for: FCC ID: IPH-04448 IC: 1792A-04448 Pursuant to FCC 47 CFR 0.457(d) and 0.459 and IC RSP-100, Section 12.4, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Exhibit ☐ Short Term ☒ Permanent ☐ Not Provided Block Diagrams ☒ Short Term ☐ Not Provided External Photos ☒ Short Term ☐ Permanent ☐ Not Provided Internal Photos ☐ Short Term ☒ Permanent ☐ Not Provided Operation Description/Theory of Operation ☐ Short Term ☐ Permanent ☒ Not Provided Parts List & Placement/BOM ☐ Short Term ☒ Permanent ☐ Not Provided Tune-Up Procedure ☐ Short Term ☒ Permanent ☐ Not Provided Schematics ☒ Short Term ☐ Not Provided Test Setup Photos ☒ Short Term ☐ Permanent ☐ Not Provided User’s Manual The above-mentioned company has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality: The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality (if applicable): The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of 180 days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify Timco in the event information regarding the product or the product is made available to the public before the requested period has expired. Timco will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04- 1705. Sincerely, By: __________________________ Nic Johnson, Technical Manager, NCEE Labs

September 15, 2023 Federal Communications Commission Equip Approval Services Post Office Box 358315 Pittsburgh, Pennsylvania 15215-5315 To Whom It May Concern: Pursuant to 47 CFR 2.911, Garmin International, Inc. (Garmin) has authorized Nic Johnson of the Nebraska Center for Excellence in Electronics to act on Garmin’s behalf for the sole and express purpose of processing applications to the Federal Communication Commission (FCC) for equipment FCC authorization. This authorization is limited to FCC ID: IPH-04448. Consistent with the foregoing, Nic Johnson is authorized to: 1)Sign Form 731, 2)Sign letter s of application, 3)Request confidentiality, and 4)Exchange data and information with the FCC, and authorized TCBs on behalf of Garmin. This authorization is not assignable to other beyond Nic Johnson. No party to this ap plication is subject to a denial of benefits, including FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C 862. We also declare that the information provided to the FCC is true and correct to the best of our knowledge (47 CFR 2.911(d)) and we have been informed of the grantee responsibilities (47 CFR 2.909) with regard to certified equipment. This a uthorization expires February 2, 2024 Sincerely, Mike Moranha Lead Compliance Engineer Garmin International - ----------------------------------------------------nothing follows----------------------------------------------------

June 21, 2023 Federal Communications Commission Authorization and Evaluation Division 1435 Oakland Mills Road Columbia, MD 21046 Innovation, Science and Economic Development Canada Certification and Engineering Bureau 3701 Carling Avenue PO Box 11490, Station H Ottawa, Ontario, Canada K2H 8S2 To Whom It May Concern: Pursuant to 47 CFR 2.911, Garmin International, Inc. (Garmin) has authorized the following Garmin International Associates to act on Garmin's behalf for the sole and express purpose of processing applications to the Federal Communication Commission (FCC) and Innovation, Science and Economic Development Canada (ISED) for equipment authorization or certification. Mr. Chris Strauss, Compliance Engineering Team Lead Mr. William Pertner, Compliance Engineering Team Lead Mr. Jay Everett, Compliance Engineering Team Lead Mr. Mike Moranha, Compliance Engineer Ms. Poojita Bhattu, Compliance Engineer Mr. Jeffrey Hailey, Compliance Engineer Mr. Dan Irish, Compliance Engineer Mr. Kiran Kumar, Compliance Engineer Mr. Tim Olson, Compliance Engineer Mr. Carlos Ortega, Compliance Engineer Mr. David Utt, Staff Compliance Engineer Mr. Jonathan Shafer, Design Certification Engineer Ms. Sara Jones, Design Certification Engineer Mr. Jacky Yeung, Compliance Engineer As such, the Garmin Associates listed above are authorized to: 1) sign Form 731, 2) sign letters of application, 3) request confidentiality, and 4) exchange data and information with the FCC, IC and/or authorized TCBs on behalf of Garmin. In addition, these individuals shall be considered "authorized individuals" to act on Garmin's behalf where an "authorized individual's" attestation is necessary or preferred. This authorization remains in effect until notified to the contrary by Garmin. Sincerely, Ben Karsak Manager Compliance Engineering Garmin International, Inc.

A04448 External Photos Front Back To p Botom Le� Right

A04448 E-Label Information 1)The following instructions are provided in the Quick Start Manual (QSM) that ships with the device. a.Label viewing instructions are found in the owner’s manual (outlined here for reference) and available online at www.garmin.com b.To get the owner’s manual, go to www.garmin.com/manuals 2)The fo llowing steps are the instructions provided in the owner’s manual which is available at www.garmin.com/manuals. 3)Scrol l the “about” page to display the following information. M/N: A04448 IC: 1792A-04448 FCC ID: IPH-04448 4)The above information is programmed by Garmin in such a manner that third parties cannot modify it. a.“No special accessories or supplemental plug-ins (e.g., installation of a SIM/USIM card) are required to access the information. Access to the information is provided without special codes, accessories, or permissions beyond the normal security protection to unlock the screen, sign-in page, or overall product access.” 5)The above M/N, FCC ID, and IC numbers can be found printed on the product packaging. 6) The regulatory information presented will be easily readable without requiring magnification assistance.

A04448 Internal Photos PCB botom PCB Top (unshielded) PCB Top (Shielded)

© 2023 RF Exposure Lab, LLC This report shall not be reproduced except in full without the written approval of RF Exposure Lab, LLC. 802 N. Twin Oaks Valley Road, Suite 105 • San Marcos, CA 92069 • U.S.A. TEL (760) 471-2100 • FAX (760) 471-2121 http://www.rfexposurelab.com CERTIFICATE OF COMPLIANCE SAR EVALUATION Garmin International, Inc. Dates of Test: September 20-21, 2023 1200 E. 151 st Street Test Report Number: SAR.20230913 Olathe, KS 66062 Revision A Lab Designation Number: US1195(FCC) & US0194(ISED) This wireless mobile and/or portable device has been shown to be compliant for localized specific absorption rate (SAR) for uncontrolled environment/general exposure limits specified in ANSI/IEEE Std. C95.1-1992 and had been tested in accordance with the measurement procedures specified in IEC 62209- 1528:2020 (See test report). I attest to the accuracy of the data. All measurements were performed by myself or were made under my supervision and are correct to the best of my knowledge and belief. I assume full responsibility for the completeness of these measurements and vouch for the qualifications of all persons taking them. RF Exposure Lab, LLC certifies that no party to this application has been denied FCC benefits pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). Jay M. Moulton Vice President Testing Cert. # 2387.01 FCC ID: IPH-04448 IC Certificate: 1792A-04448 Model(s): A04448 Test Sample: Engineering Unit Same as Production Serial No.: 16404199 Equipment Type: Digital Transmission System Transceiver Classification: Portable Transmitter Next to Extremity TX Frequency Range: 2402 – 2480 MHz; 2412 – 2462 MHz Frequency Tolerance: ± 2.5 ppm Maximum RF Output: 2450 MHz (b) – 13.0 dBm, 2450 MHz (g) – 14.0 dBm, 2450 MHz (n) – 16.0 dBm, 2450 MHz (BT) – 12.0 dBm, 2450 MHz (ANT) – 4.0 dBm, 13.56 MHz – <0 dBm Conducted Signal Modulation: GFSK, DSSS, OFDM Antenna Type: Internal Antenna Application Type: Certification FCC Rule Parts: Part 2, 15C KDB Test Methodology: KDB 447498 D01 v06, KDB 865664 D01 v01r04, KDB 865664 D02 v01r02 Industry Canada: RSS-102 Issue 5, Safety Code 6 Max. Stand Alone SAR Value: 0.11 W/kg Reported Separation Distance: 0 mm Report Number: SAR.20230913 © 2023 RF Exposure Lab, LLC Page 2 of 59 This report shall not be reproduced except in full without the written approval of RF Exposure Lab, LLC. Table of Contents 1. Introduction ........................................................................................................................ 4 SAR Definition [5] ................................................................................................................... 5 2. SAR Measurement Setup ................................................................................................... 6 Robotic System ...................................................................................................................... 6 System Hardware ................................................................................................................... 6 System Electronics ................................................................................................................. 7 Probe Measurement System .................................................................................................. 7 3. Probe and Dipole Calibration .............................................................................................15 4. Phantom & Simulating Tissue Specifications .....................................................................16 Head & Body Simulating Mixture Characterization ................................................................16 5. ANSI/IEEE C95.1 – 1999 RF Exposure Limits [2] ..............................................................17 Uncontrolled Environment .....................................................................................................17 Controlled Environment .........................................................................................................17 6. Measurement Uncertainty .................................................................................................18 7. System Validation..............................................................................................................19 Tissue Verification .................................................................................................................19 Test System Verification ........................................................................................................19 8. SAR Test Data Summary ..................................................................................................20 Procedures Used To Establish Test Signal ...........................................................................20 Device Test Condition ...........................................................................................................20 SAR Data Summary – 2450 MHz Extremity 802.11n & BT BR ..............................................23 9. Test Equipment List ...........................................................................................................24 10. Conclusion ....................................................................................................................25 11. References ....................................................................................................................26 Appendix A – System Validation Plots and Data .......................................................................27 Appendix B – SAR Test Data Plots ...........................................................................................29 Appendix C – SAR Test Setup Photos ......................................................................................31 Appendix D – Probe Calibration Data Sheets ............................................................................34 Appendix E – Dipole Calib…

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The Nebraska Center for Excellence in Electronics (NCEE) authorizes the above-named company to reproduce this report provided it is reproduced in its entirety for use by the company’s employees only. Any use that a third party makes of this report, or any reliance on or decisions made based on it, are the responsibility of such third parties. NCEE accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This report applies only to the items tested. AUT Report Prepared for: Garmin International Inc. Address: 1200 E. 151st Street Olathe, Kansas, 66062, USA Product: A04448 Test Report No: R20230808-00-A1 Approved by: __________________ Fox Lane, EMC Test Engineer DATE: September 29, 2023 Total Pages: 10 AaA Report Number: R20230808-00-A1 Rev 0 Prepared for: Garmin International Inc. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 2 of 10 REVISION PAG E Rev. No. Date Description 0 29 September 2023 Issued by FLane Prepared by FLane AaA Report Number: R20230808-00-A1 Rev 0 Prepared for: Garmin International Inc. The Nebraska Center for Excellence in Electronics 4740 Discovery Drive Lincoln, NE 68521 Page 3 of 10 CONT EN TS Revision Page ............................................................................................................................................................................... 2 1.0 Summary of test results ....................................................................................................................................... 4 2.0 EUT Description ............................................................................................................................................................ 4 2.1 Equipment under test ........................................................................................................................................ 4 3.0 Laboratory and General Test Description ........................................................................................................ 5 3.1 Laboratory description ...................................................................................................................................... 5 3.2 Test personnel ..................................................................................................................................................... 5 3.3 Test equipment.................................................................................................................................................... 6 3.4 General Test Procedure and Setup for Radio Measuremnts ................................................................... 7 4.0 Results .................................................................................................................................................................... 8 4.1 Antenna Gain ........................................................................................................................…

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