V9N950350000The wireless link uses the Digital Enhances Cordless Telecommunications (DECT) 6.0 protocol, which uses the 1920- 1930MHz UPCS band in the US.

FL Series V2 Headsets DECT7, Bluetooth, and Electronic Headsets Manual 17600 SW 65 th Ave, Lake Oswego, OR 97035 USA 800-432-4342 • [email protected] • flightcom.net Table of Contents Overview 1 Model Matrix 1 Replacement Parts 1 Accessories (not included) 1 Features 1 Common Features, All Models 1 Common Features, Communication Headsets 2 Wireless Bluetooth® Technology 3 Wireless DECT7 Communications 3 Configuring the Headset 4 Headband Removal 4 Headband Installation 4 Behind Head Headstrap Installation 5 Replacing the Ruggedizer 5 Connecting a Two-Way Radio 5 Fitting 6 Overhead Fitment 6 Behind Head Fitment 6 Fitment Warnings 7 Charging 8 Battery Replacement 9 LED Indications 9 Settings & Operation 10 Buttons 10 Advanced Menu 11 Wireless Bluetooth® 12 Wireless DECT7 12 DECT Signal Strength 12 Quick Launch 13 PC Programming 13 Locating the USB Port 13 Installation of Sonetics Configurator Software for Windows 13 Care and Maintenance 14 Mic Muff Replacement 14 Ear Seal Replacement 14 Troubleshooting 15 Service Contact: 15 General Connection Issues 15 Wired Auxiliary 15 Wireless Bluetooth 15 Wireless DECT 15 Glossary 16 Specifications 16 Headset 16 Regulatory 16 Bluetooth® Specifications 17 DECT Specifications 17 Flightcom Ground Support Standard Limited Warranty 18 1 | Page Overview The Flightcom FL Series Electronic Headset protects you from dangerous noise while keeping other audio at a comfortable listening level. It protects your hearing without sacrificing your safety or situational awareness. You can hear alarms, music, or even have a face-to-face conversation while still being protected. Simultaneous integration with two-way radios, cell phones, and MP3 players is available via wired and optional Bluetooth inputs. DECT7 models extend conference-call-like team communication up to 1,600 feet (line of sight). The rugged and comfortable design ensures this headset is ready for tough work environments. Model Matrix FL651C FL652C FL653DL FL653H FL657C FL659C FL659AM Listen Through      Wired AUX      Wireless Bluetooth      Wireless DECT7       = Included  = Not Available Replacement Parts Silicone Ruggedizers Earseals Mic Muffs Head Bands and Head Straps Batteries Speaker Covers Accessories (not included) Hard Hat Adaptors Auxiliary PR Radio Interface - Connect to any portable two-way radio and many other devices Silicone Ruggedizers in a variety of colors to meet your team’s needs Earseals to enhance comfort Worldwide Power Adaptor Heavy Duty DC Charging Cable Features Common Features, All Models Adjustable Volume Control The Headset has a user adjustable volume control. For convenience, the Headset will remember the last setting each time it is turned on. Automatic Loud Noise Suppression The Headset will limit high impulse sounds, such as gun shots, from being transmitted to the user when using the Stereo Listen Through. Convertible Headband The Headset is user configurable for overhead, behind-head, or hard hat (with hard hat accessory). This gives the user the ability to change the way they use the Headset over time without needing to invest in a new one. Multi-Color Ruggedizers The ruggedizers offer additional abrasion and impact protection. They are available in many colors (sold separately) to give the user the ability to define teams, roles, or enhance safety. Extreme Environmental Design The Headset has an IP-66 dust and water egress rating. Even when worn in heavy rain, the Headset will still be useable. Operation has been verified to -22F / -30C for extreme cold weather environments. 2 | Page Flexible Charging An AC adaptor and DC automotive charging cable are included to allow charging in most environments. Hearing Protection The Headset conforms to many hearing protection standards, keeping the user safe from harmful noise. In Headset Charging The Headset has charging circuitry built in allowing it to be charged from multiple sources. These include the supplied AC wall adaptor and multiple DC charging options from a variety of sources including most cars, trucks, and aircraft. Refer to specification for charging voltages and power requirements. Light Weight Through the use of the latest weight saving technologies, Flightcom is able to deliver a wireless headset that is lighter than many wired headsets. Listen Through Situational Awareness The Headset has two listen through microphones to give the user stereo situational awareness. The microphones are placed on the forward edge of the headset to give the user the perception of sounds in the front versus from the rear. The listen through has a programmable volume level and limits all sounds the user hears to 82dB. Long Battery Life With over 24 hours of battery life on DECT7 Headsets, and 44 hours of battery life on those without, the Headset works whenever the user needs it. Multimode Auto Shutdown To extend the life of the batteries, the Headset will automatically shut down. Bluetooth and DECT7 Wireless Shutdown: If a DECT wireless connection has been established, the Headset will power down after 5 minutes if the connection is lost. Non-Activity Shutdown: Headsets shut down after 1 hour if not used. The headset will announce when it is about to shut down. Shutdown may be cancelled by pressing any button. Two Stage Low Battery Alert The Electronic Headset has a two-stage low battery alert system to notify the user of a depleted battery before communications are lost. USB Programmable Using their USB port, Headsets can be configured using a Windows PC. Many of the features may be customized and saved. Refer to the Sonetics Headset Software for details. User Replaceable Battery The Electronic Headset uses a replaceable battery. This allows the user to replace the battery at end-of-life and have spares in the field for extended operation times. Only Sonetics batteries should be used. Voice Prompts Voice prompts allows the user to make all adjustments without removing the headset. There is no need to…

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FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 External Photos Figure 1 - External Photos – Perspective View Figure 2 - External Photos – Front and Back FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 External Photos Figure 3 - External Photos – Left and Right Side

FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 Label Exhibit: The following label is affixed to the inner dome of the headset by hand with a printed label.

FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 Internal Photos Figure 1 - Internal Photos – Right Side Figure 2 - Internal Photos – Right Side PCBA – BT Module, Front and Back Figure 3 - Internal Photos – Right Side PCBA - No BT Module, Front and Back FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 Internal Photos Figure 4 - Internal Photos – Left Side Figure 6 - Internal Photos – Left Side PCBA, Front and Back FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 Internal Photos Figure 7 – Right Side PCBA – F Antenna Location Figure 8 – Right Side PCBA – BT Antenna Location FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 APX.V2 Internal Photos Figure 9 – Left Side PCBA – F Antenna Location

APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 1 10/6/2023 1. Purpose This report evaluates the RF exposure of the APX.V2 headset. This report follows the calculations outlined in OET bulletin 65, Edition 97-01. 2. References • RSS-102, Radio Frequency (RF) Exposure Compliance of Radiocommunication Apparatus (All Frequency Bands), Issue 5 • FCC 47 CFR Part 1, section 1.310 • FCC KDB 447498 DO1, RF Exposure Procedures and Equipment Authorization Polices for Mobile and Portable Devices, V6 • OET bulletin 65, Evaluating Compliance with FCC Guidelines for Human Exposure to Radio frequency Electromagnetic Fields, Edition 97-01 3. Equipment Description Description: DECT 7.0 Headset Model: APX.V2 Additional Model(s): APX379-OH.V2, APX379-BH.V2, APX379-HH.V2, APX377-OH.V2, APX377-BH.V2, AP377- HH.V2, FHW507.V2, UHW507.V2, FHW505.V2, UWH505.V2, UHW503.V2, FL659C, FL659AM, FL657C, FL651C, FL653DL, FL652C, FL653H Brand Name(s): Sonetics Corporation Serial Number: APX379V2FW002 IPEI: 03:7B:E9:55:E0 HW version: Rev A FW Version: 490-4100-00 FCC ID: V9N950350000 IC: 7895A-950350000 Equipment type: End Product 3.1. Radiation Sources Mode Description UPCS Frequency Range 1921.536 – 1928.448 MHz Channels 5 Modulations GFSK Max Conducted power [dBm] 20.34 Antenna gain [dBi] 0 ISM Frequency Range 2400 – 2483.5 MHz Channels 79 Modulations GFSK Max Conducted power [dBm] 2.69 Antenna gain [dBi] 1.1 APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 2 10/6/2023 Figure 1 – Minimum Distance to Head APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 3 10/6/2023 4. RF Exposure Classifications The tables below show the IC and FCC limits for mobile devices in the General public exposure category: FCC Limits – Occupational / Controlled Exposure Frequency range [MHz] Electric field strength [V/M] Magnetic field strength [A/M] Power density [mW/cm^2 ] Averaging time [min] 0.3 - 30 614 1.63 100 6 3.0 - 30 1842/f 4.89/f 900 / f^2 6 30 - 300 61.4 0.163 1 6 300 - 1500 N/A N/A f/300 6 1500 - 100000 N/A N/A 5 6 FCC Limits – General Population / Uncontrolled Exposure Frequency range [MHz] Electric field strength [V/M] Magnetic field strength [A/M] Power density [mW/cm^2 ] Averaging time [min] 0.3 - 1.34 614 1.63 100 30 1.34 - 30 842/f 2.19/f 180/f^2 30 30 - 300 27.5 0.073 0.2 30 300 - 1500 N/A N/A f/1500 30 1500 - 100000 N/A N/A 1 30 IC Limits – Occupational / Controlled Exposure Frequency range [MHz] Electric field strength [V/M] Magnetic field strength [A/M] Power density [W/m^2 ] Averaging time [min] 1.0 - 10.0 600/f 4.9/f N/A 6 10.0 - 30.0 60 4.9/f N/A 6 30 - 300 60 0.163 10 6 300 - 1500 3.54 * f^0.5 .0094*f^0.5 f/30 6 1500 - 15000 137 0.364 50 6 IC Limits – General Population / Uncontrolled Exposure Frequency range [MHz] Electric field strength [V/M] Magnetic field strength [A/M] Power density [W/m^2 ] Averaging time [min] 1.0 - 10.0 280/f 2.19/f N/A 30 10.0 - 30.0 28 2.19/f N/A 30 30 - 300 28 0.073 2 30 300 - 1500 1.585*f^0.5 .0042*f^0.5 f/150 30 1500 - 15000 61.4 0.163 5 30 APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 4 10/6/2023 5. Assessment OET bulletin 65 uses the following equation to predict the strength of an RF field at a given distance: 푆= 푃∗퐺 4∗휋∗푅 2 푆 퐷 = 푃∗퐷∗퐺 4∗휋∗푅 2 Where: S = Power density (mW/cm^2 or W/m^2) S D = Duty cycle power density (mW/cm^2 or W/m^2) P = Power input to the antenna (mW) D = minimum duty cycle (%) (KDB 447498 DO1 - Section 6.1) G = power gain of the antenna in the direction of interest relative to an isotropic radiator R = distance to the center of radiation of the antenna (cm) The results of the assessment are shown below: UPCS Assessment Results Variable Value Unit Assessment frequency (f) 1921.536 MHz Peak Conducted Power (P) 20.34 dBm 108.14 mW Product Duty Cycle (D_p) 4.2 % Minimum Duty Cycle (D) (KDB 447498 DO1 - Section 6.1 ) 50 % Peak Conducted Power with Duty Cycle (P_D) 10.17 dBm 10.40 mW Peak Antenna Gain (G) 0 dBi 1 Distance (R) 26.3 cm Power Density (S D ) 0.12 mW/cm^2 1.20 W/m^2 APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 5 10/6/2023 ISM Assessment Results Variable Value Unit Assessment frequency (f) 2402 MHz Peak Conducted Power (P) 2.69 dBm 1.86 mW Peak Antenna Gain (G) 1.1 dBi 1.29 Distance (R) 2.53 cm Power Density (S) 0.03 mW/cm^2 0.30 W/m^2 The power density of the EUT is below the FCC/IC MPE limit. 5.1. Product Duty Cycle Justification DECT is broken into 24 time slots per channel. The headset will only transmit in one of those time slots which yields a 42ms pulse and a 4.2% duty cycle since there are 100 pulses per second. Figure 2 – Time DECT Frequency Spectrum 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 0 1 2 a a 3 4 5 6 b b 7 8 9 Time DECT Frequency Spectrum Time Slots RF Channels Cycle = 10ms Down Link Uplink APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 6 10/6/2023 6. SAR Test Exclusion KDB 447498 DO1 General RF Exposure Guidance 4.3.1.a 4.3.2.b and 7.2.a uses the following equation for simultaneous transmission SAR exposure. 푆= 푃 푅 ∗ √ 푓 푓표푟 ≤50 푚푚 푠푒푝푒푟푎푡푖표푛 푑푖푠푡푎푛푐푒 푆= 푃 푅 ∗ √ 푓 푋 푓표푟 ≤50 푚푚 푠푒푝푒푟푎푡푖표푛 푑푖푠푡푎푛푐푒 푆 푇표푡푎푙 =푆 퐼푆푀 +푆 푈푃퐶푆 푆 푠푖푚푢푡푎푛푒표푢푠 푇푟푎푛푠푚푖푠푠푖표푛 = (푆 퐼푆푀 +푆 푈푃퐶푆 ) 1.6 + ∑푀푃퐸 푟푎푡푖표푠 ≤1.0 Where: P = Max Power (mW) R = Separation Distance (mm) f = Frequency (GHz) X = 7.5 for 1-g SAR and 18.75 for 10-g SAR S = SAR Calculated Value (W/kg) MPE ratios = Maximum permissible exposure ratios APX.V2 Headset RF Exposure Assessment Report 17600 SW 65 th Ave. Lake Oswego, OR 97035 Page | 7 10/6/2023 Simultaneous Transmit SAR Test Exclusion Calculation Results Variable Value Unit ISM Assessment frequency (f) 2.402 GHz ISM Peak Conducted Power (P) 1.86 mW UPCS Assessment frequency (f) 1.921 GHz UPCS Peak Conducted Power (P) 10.40 mW Separation Distance (R) 25.3 …

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EMI4019.05 Testing Report Page 1 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 FCC (USA)/ISED (Canada) TEST REPORT FCC 47 CFR Part 15D Unlicensed Personal Communications Service Devices Industry Canada RSS-213 2 GHz License-exempt Personal Communications Service Devices (LE-PCS) EMI4019.05 Testing Report Page 2 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 Report Reference No: SON20221114 Testing Laboratory: ElectroMagnetic Investigations, LLC Address: 8531 NE Cornell Road. Suite 600, Hillsboro, OR, USA Accreditation: A2LA Accredited Testing Laboratory Applicant’s name: Sonetics Corporation Address: 17600 SW 65th Ave. Lake Oswego OR 97035 United States Testing specification Standard: FCC 47 CFR Part 15D FCC 47 CFR Part 15C FCC 47 CFR Part 15B RSS-213, Issue 2, 2005-12 RSS-Gen, Issue 3, 2010-12 ANSI C63.17 :2013 ANSI C63.4 :2014 Equipment Under test (EUT): Gen 3.9 Wireless Headset Serial Number: APX37-9V2-FW-002 Product description: DECT headset with Listen through capability and Bluetooth connectivity Model No. APX.V2 Additional Model(s): APX378 (DECT-only version) Hardware version: APX.V2 Firmware / Software version: N/A FCC ID: V9N950350000 IC ID 7895A-950350000 Test result: Passed EMI4019.05 Testing Report Page 3 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 Possible test case verdicts Neither assessed nor tested: N/N Required by standard but not applicable: N/A Required by standard but not tested: NOT PERFORMED Not required by standard: N/R EUT meets the requirement: P (Pass) EUT does not meet the requirement: F (Fail) Testing Test Lab Temperature: 20 – 28 C Test Lab Humidity: 30 – 38 % Date EUT received: August 29, 2022 Date(s) of performance of tests: August 29, 2022 to March 13, 2023 Complied by: Ryan Benitez Tested by: Ryan Benitez Approved by: Henry Benitez Date of issue: July 25, 2023 Total number of pages: 75 General remarks The test results presented in this report relate only to the object tested. The results contained in this report reflect the results for this particular model and serial number. It is the responsibility of the manufacturer to ensure that all production models meet the intent of the requirements detailed within this report. This report shall not be reproduced, except in full, without written approval of the issuing test laboratory. EMI4019.05 Testing Report Page 4 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 Revision History Version Date Issued Description of Revision Authorizations FCC (USA): Accepted by FCC for performance of radiated emissions and conducted emissions measurements. FCC ID: US1092. Industry Canada: Accepted by Industry Canada for performance of radiated emissions and conducted emissions measurements. ISED Canada CAB ID US0203. European Union (CE): ElectroMagnetic Investigations, LLC is equipped and capable of performing EMC CE compliance testing to European Union EMC CE requirements for Information Technology Equipment (ITE), Measurement, Control and Laboratory Equipment (MCL), and other equipment. American Association of Lab Accreditations (A2LA): ElectroMagnetic Investigations is accredited to perform the tests contained within this report to the standards listed. Certificate #2569.01 EMI4019.05 Testing Report Page 5 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 Report Index 1 Equipment (Test item) Description 1.1 Photos – Equipment external 1.2 Photos - Equipment internal 1.3 Photos – Test setup 1.4 Supporting equipment used during testing 1.5 Test modes 1.6 Test equipment used during testing 1.7 Sample of emissions level calculations 2 Result Summary 3 Test Conditions and results 3.1 Channel Frequencies 3.2 AC Power line conducted emissions 3.3 Antenna requirement 3.4 Digital modulation 3.5 Occupied Bandwidth 3.6 Emissions Bandwidth 3.7 Peak transmit power 3.8 Power spectral density 3.9 Frequency stability 3.10 In-band unwanted emissions 3.11 Out-of-band emissions 3.12 Receiver spurious emissions 3.13 Automatic discontinuation of transmission 3.14 Radiofrequency radiation exposure 3.15 Monitoring threshold 3.16 LIC confirmation 3.17 LIC selection 3.18 Monitoring antenna 3.19 Monitoring time 3.20 Monitoring bandwidth 3.21 Monitoring reaction time 3.22 Access Criteria functional test 3.23 Acknowledgments 3.24 Maximum spectral occupancy 3.25 Fair access 3.26 Frame period and Jitter 3.27 Frame and repetition stability EMI4019.05 Testing Report Page 6 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 1 Equipment (Test item) description Description: DECT headset with Listen through capability and Bluetooth connectivity Model: APX.V2 Additional Model(s): APX378 Brand Name(s): Sonetics Corporation Serial number: None Hardware version: N/A Software / Firmware version: N/A FCC-ID: V9N950350000 IC: 7895A-950350000 Equipment type: End product Radio type: DECT portable part Number of radios: 1 DECT transceiver built into device and 1 Bluetooth transceiver built into device Radio technology: DECT 6.0 Operating frequency range: 1921.536 – 1928.448 MHz Assigned frequency band: 1920 – 1930 MHz Number of RF channels: 5 Supported slots: even and odd Number of time slots: 12 x Tx + 12 x Rx = 24 Channels F 0 CH:1 / 1928.448 MHz F 1 CH:2 / 1926.720 MHz F 2 CH:3 / 1924.992 MHz F 3 CH:4 / 1923.264 MHz F 4 CH:5 / 1921.532 MHz Main test frequencies F low CH:5 / 1921.532 MHz F mid CH:3 / 1924.992 MHz F high CH:1 / 1928.448 MHz Modulations GFSK Emissions designator F7D Nominal emission bandwidth 1.42 MHz Channel spacing 1728 kHz Spectrum access Listen before transmit Nominal lower threshold N/A Nominal upper threshold -60 dBm Number of antennas 2 EMI4019.05 Testing Report Page 7 of 75 SON20221114 ElectroMagnetic Investigations APX.V2 Antenna 1 Type integrated Model printed f antenna Manufacturer Sonetics Gain 0 dBi Antenna 2 Type integrated Model printed f antenna Manufacturer Sonetics Gain 0 dBi Manufacturer Sonetics Corporation 17600 SW 65th Ave. Lake Oswego OR 97035 United States Power supply V nom 12 V …

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FCC ID: V9N950350000 17600 SW 65 th Ave. Lake Oswego, OR 97035 IC UPN: 7895A-950350000 Headset Antenna Specification The APX.V2 product line uses two internal antennas, one in each ear dome. The specifications of the antennas are shown below: Antenna Internal Antenna (Left Dome) Internal Antenna (Right Dome) Internal Bluetooth Antenna Photo Manufacturer Sonetics Sonetics Pulse Electronics Part # N/A N/A W3008 Sonetics Part# N/A N/A 194-0001-00 Frequency 1921-1930 MHz 1921-1930 MHz 2400MHz Gain 0dBi 0dBi 1.1dBi Polarization Vertical Vertical Linear Azimuth @ 1925MHz Elevation @ 1925MHz Signature: __________________________________________________________ Date: ___October 20, 2023__

Conducted Emissions Radiated Emissions DECT Tester Environmental