U7GBBGOKPDigital Portable Radio

105X150mm Klein Electronics, Inc. 2026 USER GUIDE 1 GO-KP Quick Start:Perform the following steps to assemble your handheld radio:• Charge the battery.• Install the battery.• Install the antenna.• Install the belt clip.• Turn on the radio.• Select a channel.• Install your audio accessory (if needed).• Adjust the volume.Charging the BatteryThe radio is powered by a Li-lon battery. To protect the batter y from damage and comply with the warranty conditions, you can use only the charg er provided with the battery for charging. To maximize battery performance, it i s recommended to charge the battery for 10 to 12 hours before the first use. Installing the BatteryAlign the battery with the battery slot on the rear side of the radio. Push the battery into the slot until it is fastened. Before removing the battery, turn off the radio first. Press the battery fastener and then remove the bat tery. Installing the AntennaTurn off the radio, place the antenna into the installation hol e, and turn the antenna clockwise. To remove the antenna, turn the antenna anti clockwise. Before removing the antenna, ensure that you have turned off th e radio and removed the universal interface cover. To replace the antenna, use a specified antenna to replace the old one. Otherwise, your radio may be da maged. Installing the Belt ClipAlign the screw holes on the belt clip with those on the rear s ide of the radio and fasten the belt clip with screws.Turning On the radioTurn the volume/power knob clockwise until you hear a click sou nd. The radio gives a short beep sound, indicating that the radio is successf ully turned on. Klein Electronics, Inc. 2026 3 2 Klein Electronics, Inc. 2026 Klein Electronics, Inc. 2026 Selecting a ChannelSimply look at the knob with the numbers and rotate until you l and onto the group channel you desire. You should also hear the Voice Enunciation through the speaker or earpiece of which channel you are on. Installing an Audio AccessoryRemove the protective cover on the side of the radio and plug i n your earpiece or headset. Adjusting the VolumeTurn the volume knob clockwise to turn up the volume. To turn d own the volume knob anticlockwise. Be careful if you are wearing an audio acce ssory! Radio ControlPlease read the following carefully: • Radio Overview• Programmable buttons• PTT button Radio Overview No. Feature No. Feature 1 Antenna 8 LCD 2 PTT button 9 Keypad 3 Side button PF1 10 Channel knob 4 Side button PF2 11 Volume/power knob 5 Top button PF3 12 LED indicator 6 Speaker 13 SP/MIC cover 7 MIC 14 Battery OK ,.? ABC GHI JKL TUV MNO PQRS CAPS WXYZ DEL DEF OK ,.? ABC GHI JKL TUV MNO PQRS CAPS WXYZ DEL DEF 1 5 1113141210 9 6 87 234 5 4 Klein Electronics, Inc. 2026 Klein Electronics, Inc. 2026 Side Button PF1/PF2 and Top Button PF3These buttons can be programmed for certain functions by PC sof tware. The function features that can be programmed are listed below, you can active/ deactivate the function by a short press or a long press once t he key is programmed. • Short press - Pressing and releasing immediately.• Long press - Pressing and holding for the programmed duration No. 1 All Alert Tones On/Off 2 Emergency On 3 Emergency Off 4 High/Low Power 5 Monitor 6 Nuisance Delete 7 One Touch Access 1 8 One Touch Access 2 9 One Touch Access 3 10 One Touch Access 4 11 One Touch Access 5 12 One Touch Access 6 13 Repeater/Talkaround 14 Scan On/Off 15 Tight/Normal Squelch 16 Vox On/Off 17 Zone Toggle 18 Lone Work On/Off 19 Companding 20 TX interrupt 21 Main Channel 22 Noise Reduction 23 Bluetooth Menu Assignable functions on Side Button PF1/PF2 and Top Button PF3 LCD Display IconsThe LCD display of your radio shows radio status, text entries, and menu entries. The following are icons that appear on the status bar at the to p of the radio's display. lcons are displayed on the status bar, arranged left-t o-right, in order of appearance/usage and are channel specific. Canceled function ic ons will not be displayed. Received Signal Strength indicatorThe number of bars displayed represents the radio signal streng th. Four bars indicate the strongest signal. This icon is only displayed whil e receiving. Power LevelRadio is set at Low power or high power. BatteryThe number of bars (0-4) shown indicates the charge remaining i n the battery. if it is blinking the battery is low. Narrow bandThe current channel spacing is 12.5KHz (Analog narrow band or d igital). Channel Mode The current channel mode is analog mode. The current channel mode is digital mode. The current channel mode is mixed mode. CTCSS ToneThe current analog channel has a CTCSS tone. DCS ToneThe current analog channel has a DCS tone ScanScan feature is enabled. LH Z N CTCDCS A D 7 6 Klein Electronics, Inc. 2026 Klein Electronics, Inc. 2026 Unread MessageThe text message has not been read. Full MessageThe text message memory is full. Tones DisableTones are turned off. Talk AroundIn the absence of a repeater, radio is currently configured for direct radio to radio communication.Call Icons. Private CallIndicates that a Private Call is in progress. In the contacts l ist, it indicates a subscriber alias(name) or ID(number). Group Call/All CallIndicates that a Group Call or All Call in progress. In the con tacts list, it indicates a group alias (name) or ID(number). Bluetooth It indicates that Bluetooth is turned on but not connected. It indicates that Bluetooth is turned on and connected. • LED IndicatorThe LED indicator shows operation status of your radio.Red: Radio is transmitting a signal, sending a text message, se nding a privacy-enabled call or data.Green: Radio is Powered on or receiving a signal, receiving a t ext message, receiving a privacy-enabled call or data.Blinking Red: Radio is in scan mode. • Keypad • Users can scroll through the function menu by pressing <> to select a function, press Ok to confirm or press to go back to the last menu. • Users can use the 4X3 alphanumeric keypad to input the contact aliases, ID and te…

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FCC ID and ISED Label Location 30mm*30mm

Report No.: AGC15733260402FH01 Page 1 of 3 APPENDIX C. TEST SETUP PHOTOGRAPHS Face Up with 2.5 cm Separation Distance. Body Back Touch with all accessories The thickness of EUT is 3.7 cm 25mm Report No.: AGC15733260402FH01 Page 2 of 3 Note : The headset is just for testing. This tested and electrically similar headsets may be used. Report No.: AGC15733260402FH01 Page 3 of 3 DEPTH OF THE LIQUID IN THE PHANTOM—ZOOM IN Note：The position used in the measurement was according to IEEE 1528-2013 450MHz flat phantom

ReportNo.:AGC15733260402AP01 Page1of3 TESTSETUPPHOTOS RadiatedEmissionTestSetupBelow1GHz RadiatedEmissionTestSetupAbove1GHz ReportNo.:AGC15733260402AP01 Page2of3 ACPowerLineConductedTestSetup BTConductedTestSetup ReportNo.:AGC15733260402AP01 Page3of3 UHFConductedTestSetup ****************************************EndofReport*************************************

Report No.: AGC15733260402FR03 Page 44 of 69 Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Report No.: AGC15733260402FR03 Page 45 of 69 Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Emission Mask [email protected] Report No.: AGC15733260402FR03 Page 46 of 69 9. Modulation Characteristics 9.1 Provisions Applicable According to FCC§2.1047 and §90.207, for Voice Modulation Communication Equipment, the frequency response of the audio modulation circuit over a range of 100 to 5000Hz shall be measured. 9.2 Measurement Procedure  Modulation Limit 1. Test layout and build equipment as shown below. 2. adjust the audio input for 60% of rated system deviation at 1kHz using this level as a reference (0dB). 3. Vary the input level from –20 to +20dB. 4. Record the frequency deviation obtained as a function of the input level. 5. Repeat step 2 with input frequency changing to 300, 1000, 1500 and 3000Hz in sequence.  Audio Frequency Response 1. Test layout and build equipment as shown below. 2. Adjust the audio input for 20% of rated system deviation at 1 kHz using this level as a reference (0 dB). 3. Vary the Audio frequency from 100 Hz to 10 kHz and record the frequency deviation. 4. Audio Frequency Response = 20log10 (Deviation of test frequency/Deviation of 1 kHz reference). 9.3 Measurement Setup Report No.: AGC15733260402FR03 Page 47 of 69 9.4 Measurement Result A. Modulation Limit: 12.5kHz, Analog modulation, Assigned Frequency:406.125MHz-5W Modulation Level (dB) Peak Freq. Deviation At 300 Hz (kHz) Peak Freq. Deviation At 1000 Hz (kHz) Peak Freq. Deviation At 1500 Hz (kHz) Peak Freq. Deviation At 3000 Hz (kHz) -20 0.16 0.53 1.15 1.44 -15 0.35 0.82 1.36 1.69 -10 0.47 1.05 1.53 1.82 -5 0.66 1.23 1.74 2.05 0 0.78 1.35 1.82 2.26 +5 0.82 1.42 1.89 2.35 +10 0.91 1.55 2.05 2.41 +15 1.05 1.63 2.09 2.52 +20 1.04 1.61 2.08 2.49 Note: All the modes had been tested, but only the worst data recorded in the report. Report No.: AGC15733260402FR03 Page 48 of 69 B. Audio Frequency Response: Note: All the modes had been tested, but only the worst data recorded in the report. 12.5kHz, Analog modulation, Assigned Frequency:406.125MHz-5W Frequency (Hz) Deviation (kHz) Audio Frequency Response(dB) 100 -- -- 200 -- -- 300 0.19 -13.41 400 0.28 -10.04 500 0.41 -6.73 600 0.52 -4.67 700 0.58 -3.72 800 0.65 -2.73 900 0.74 -1.60 1000 0.89 0.00 1200 0.99 0.92 1400 1.23 2.81 1600 1.45 4.24 1800 1.52 4.65 2000 1.63 5.26 2400 1.74 5.82 2500 1.92 6.68 2800 2.16 7.70 3000 2.23 7.98 Report No.: AGC15733260402FR03 Page 49 of 69 10. Maximum Transmitter Power 10.1 Provisions Applicable Per FCC §2.1046 and §90.205: Maximum ERP is dependent upon the station’s antenna HAAT and required service area. 10.2 Measurement Procedure The RF output of Two-way Radio was conducted to a spectrum analyzer through an appropriate attenuator. In the semi-anechoic chamber, setup as illustrated above the DUT placed on the 0.8m height of Turn Table, rotated the table 45 degree each interval to search the maximum radiation power and receiver antenna shall be rotated vertical and horizontal polarization and moved height from 1m to 4m to find the maximum polar radiated power for each degree interval. The “Read Value” is the spectrum reading of maximum power value. The substitution antenna is substituted for DUT at the same position and signals generator (S.G) export the CW signal to the substitution antenna via a TX cable. The receiver antenna shall be rotated vertical and horizontal polarization and moved height from 1m to 4m to find the maximum radiation power. Record the power level of maximum radiation power from spectrum. So, the Measured substitution value = Ref level of S.G + TX cables loss – Substituted Antenna Gain. EIRP = “Read Value” + Measured substitution value + 2.15. 10.3 Measurement Setup Conducted Output Power: Report No.: AGC15733260402FR03 Page 50 of 69 Effective Radiated Power: Radiated Below 1GHz Radiated Above 1 GHz Report No.: AGC15733260402FR03 Page 51 of 69 10.4 Measurement Result Conducted Power Measurement Results Mode Channel Separation Test Channel Measurement Result (dBm) For 36.99dBm(5W) Analog +Voice 12.5 kHz Bottom(406.125MHz) 37.06 Middle(453.2125MHz) 37.14 Middle(458.2125MHz) 37.18 Top (469.975MHz) 37.08 Digital (Voice+ Data) 12.5 kHz Bottom(406.125MHz) 36.94 Middle(453.2125MHz) 37.10 Middle(458.2125MHz) 37.21 Top (469.975MHz) 37.20 Conducted Power Measurement Results Mode Channel Separation Test Channel Measurement Result (dBm) For 30.79dBm(1.2W) Analog +Voice 12.5 kHz Bottom(406.125MHz) 30.92 Middle(453.2125MHz) 31.42 Middle(458.2125MHz) 31.47 Top (469.975MHz) 30.52 Digital (Voice+ Data) 12.5 kHz Bottom(406.125MHz) 31.59 Middle(453.2125MHz) 31.38 Middle(458.2125MHz) 31.43 Top (469.975MHz) 30.69 Report No.: AGC15733260402FR03 Page 52 of 69 Radiated Power Measurement Results Test Mode Frequency (MHz) Reading Level (dBuv/m) Antenna Polarization S.G. (dBm) Cable Loss (dB) Ant.Gain (dBi) ERP Results (dBm) Limit (dBm) Analog +Voice 406.1250 105.88 V 30.65 0.85 6.9 36.70 36.99 406.1250 105.80 H 30.57 0.85 6.9 36.62 36.99 453.2125 106.00 V 30.77 0.85 6.9 36.82 36.99 453.2125 105.95 H 30.72 0.85 6.9 36.77 36.99 458.2125 105.98 V 30.75 0.85 6.9 36.80 36.99 458.2125 105.89 H 30.66 0.85 6.9 36.71 36.99 469.9750 105.93 V 30.70 0.85 6.9 36.75 36.99 469.9750 105.81 H 30.58 0.85 6.9 36.63 36.99 Digital (Voice+ Data) 406.1250 105.78 V 30.55 0.85 6.9 36.60 36.99 406.1250 105.70 H 30.47 0.85 6.9 36.52 36.99 453.2125 105.95 V 30.72 0.85 6.9 36.77 36.99 453.2125 105.83 H 30.60 0.85 6.9 36.65 36.99 458.2125 106.08 V 30.85 0.85 6.9 36.90 36.99 458.2125 106.00 H 30.77 0.85 6.9 36.82 36.99 469.9750 106.06 V 30.83 0.85 6.9 36.88 36.99 469.9750 105.92 H 30.69 0.85 6.9 36.74 36.99 Report No.: AGC15733260402FR03 Pa…

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Page 1 of 69 FCC Test Report FCC ID : U7GBBGOKP APPLICATION PURPOSE : Original Equipment PRODUCT DESIGNATION : Digital Portable Radio BRAND NAME : BlackBox MODEL NAME : GO-KP-UHF APPLICANT : Klein Electronics, Inc. DATE OF ISSUE : May 22, 2026 STANDARD(S) : FCC Part 90 Subpart I REPORT VERSION : V1.0 Attestation of Global Compliance (Shenzhen) Co., Ltd Report No.: AGC15733260402FR03 Report No.: AGC15733260402FR03 Page 2 of 69 Report Revise Record Report Version Revise Time Issued Date Valid Version Notes V1.0 / May 22, 2026 Valid Initial Release Report No.: AGC15733260402FR03 Page 3 of 69 Table of Contents 1. General Information ........................................................................................................................................ 5 2. Product Information ........................................................................................................................................ 6 2.1 Product Technical Description ................................................................................................................... 6 2.2 Test Frequency List ................................................................................................................................... 7 2.3 Related Submittal(S) / Grant (S) ............................................................................................................... 8 2.4 Test Methodology ...................................................................................................................................... 8 2.5 Calculation of Emission Indicators ............................................................................................................ 8 2.6 Special Accessories .................................................................................................................................. 8 2.7 Equipment Modifications ........................................................................................................................... 8 3. Test Environment ............................................................................................................................................ 9 3.1 Address of The Test Laboratory ................................................................................................................ 9 3.2 Test Facility ................................................................................................................................................ 9 3.3 Environmental Conditions ....................................................................................................................... 10 3.4 Measurement Uncertainty ....................................................................................................................... 10 3.5 List of Equipment Used ........................................................................................................................... 11 4.System Test Configuration ............................................................................................................................ 13 4.1 EUT Configuration ................................................................................................................................... 13 4.2 EUT Exercise ........................................................................................................................................... 13 4.3 Configuration of Tested System .............................................................................................................. 13 4.4 Equipment Used in Tested System ......................................................................................................... 13 4.5 Summary of Test Results ........................................................................................................................ 14 5. Description of Test Modes ........................................................................................................................... 15 6. Frequency Stability ....................................................................................................................................... 16 6.1 Provisions Applicable .............................................................................................................................. 16 6.2 Measurement Procedure ......................................................................................................................... 16 6.3 Measurement Setup ................................................................................................................................ 16 6.4 Measurement Result ............................................................................................................................... 17 7. 26dB Emission Bandwidth and 99% Occupied Bandwidth ...................................................................... 18 7.1 Provisions Applicable .............................................................................................................................. 18 7.2 Measurement Procedure ......................................................................................................................... 18 7.3 Measurement Setup ................................................................................................................................ 18 7.4 Measurement Result ............................................................................................................................... 19 8. Spurious Radiated Emission ......................................................................................................................... 23 8.1 Provisions Applicable .............................................................................................................................. 23 8.2 Measurement Procedure ...................................................................................................................…

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Page 1 of 18 CALIBRATION DATA PROBE CALIBRATION DATA Page 2 of 18 Page 3 of 18 Page 4 of 18 Page 5 of 18 Page 6 of 18 Page 7 of 18 Page 8 of 18 Page 9 of 18 Page 10 of 18 DAE CALIBRATION DATA Page 11 of 18 Page 12 of 18 Page 13 of 18 DIPOLE CALIBRATION DATA Page 14 of 18 Page 15 of 18 Page 16 of 18 Page 17 of 18 Page 18 of 18

Page 1 of 44 SAR Test Report Report No.: AGC15733260402FH01 FCC ID : U7GBBGOKP PRODUCT DESIGNATION : Digital Portable Radio BRAND NAME : BlackBox MODEL NAME : GO-KP-UHF APPLICANT : Klein Electronics,Inc. DATE OF ISSUE : May 27, 2026 STANDARD(S) : IEEE Std. 1528:2013 FCC 47 CFR Part 2§2.1093 IEEE Std C95.1 ™-2019 REPORT VERSION : V1.0 Attestation of Global Compliance(Shenzhen) Co., Ltd. Report No.: AGC15733260402FH01 Page 2 of 44 Report Revise Record Report Version Revise Time Issued Date Valid Version Notes V1.0 / May 27, 2026 Valid Initial Release Report No.: AGC15733260402FH01 Page 3 of 44 Test Report Applicant Name Klein Electronics,Inc. Applicant Address 349 N. Vinewood St Escondido, California United States 92029 Manufacturer Name Klein Electronics,Inc. Manufacturer Address 349 N. Vinewood St Escondido, California United States 92029 Factory Name Klein Electronics,Inc. Factory Address 349 N. Vinewood St Escondido, California United States 92029 Product Designation Digital Portable Radio Brand Name BlackBox Test Model GO-KP-UHF Series Model N/A Declaration of Difference N/A EUT Voltage DC 7.5V Applicable Standard IEEE Std. 1528:2013 FCC 47 CFR Part 2§2.1093 IEEE Std C95.1 ™-2019 Date of receipt of test item Apr. 14, 2026 Test Date Apr. 22, 2026 Report Template AGCRT- US -PTT/SAR (2021-04-20) Note: The results of testing in this report apply to the product/system which was tested only. Prepared By Bibo Zhang (Project Engineer) May 27, 2026 Reviewed By Jack Gui (Reviewer) May 27, 2026 Approved By Angela Li (Authorized Officer) May 27, 2026 Report No.: AGC15733260402FH01 Page 4 of 44 TABLE OF CONTENTS 1. SUMMARY OF MAXIMUM SAR VALUE ......................................................................................................... 5 2. GENERAL INFORMATION ............................................................................................................................... 6 2.1. EUT DESCRIPTION......................................................................................................................................... 6 3. SAR MEASUREMENT SYSTEM ........................................................................................................................ 7 3.1. THE DASY5 SYSTEM USED FOR PERFORMING COMPLIANCE TESTS CONSISTS OF FOLLOWING ITEMS .................... 7 3.2. DASY5 E-FIELD PROBE ................................................................................................................................. 8 3.3. DATA ACQUISITION ELECTRONICS DESCRIPTION ............................................................................................... 8 3.4. ROBOT .......................................................................................................................................................... 9 3.5. LIGHT BEAM UNIT .......................................................................................................................................... 9 3.6. DEVICE HOLDER .......................................................................................................................................... 10 3.7. MEASUREMENT SERVER ............................................................................................................................... 10 3.8. PHANTOM ................................................................................................................................................. 11 4. SAR MEASUREMENT PROCEDURE ............................................................................................................ 12 4.1. SPECIFIC ABSORPTION RATE (SAR) .............................................................................................................. 12 4.2. SAR MEASUREMENT PROCEDURE ................................................................................................................ 13 5. TISSUE SIMULATING LIQUID ....................................................................................................................... 15 5.1. THE COMPOSITION OF THE TISSUE SIMULATING LIQUID..................................................................................... 15 5.2. TISSUE DIELECTRIC PARAMETERS FOR HEAD AND BODY PHANTOMS ............................................................... 15 5.3. TISSUE CALIBRATION RESULT ....................................................................................................................... 16 6. SAR SYSTEM CHECK PROCEDURE ........................................................................................................... 17 6.1. SAR SYSTEM CHECK PROCEDURES ............................................................................................................. 17 6.2. SAR SYSTEM CHECK ................................................................................................................................... 18 7. EUT TEST POSITION ...................................................................................................................................... 19 7.1. BODY WORN POSITION ................................................................................................................................ 19 8. SAR EXPOSURE LIMITS ............................................................................................................................... 20 9. TEST FACILITY .............................................................................................................................................. 21 10. TEST EQUIPMENT LIST .............................................................................................................................. 22 11. MEASUREMENT UNCERTAINTY ................................................................................................................ 23 12. POWER MEASUREMENT ............................................................................................................................ 27 13. TEST RESU…

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Report No.: AGC15733260402AP02 Page 1 of 11 INTERNAL PHOTOS Open View-1 of EUT Open View-2 of EUT Report No.: AGC15733260402AP02 Page 2 of 11 Internal View-1 of EUT Internal View-2 of EUT Report No.: AGC15733260402AP02 Page 3 of 11 Internal View-3 of EUT Internal View-4 of EUT Report No.: AGC15733260402AP02 Page 4 of 11 Internal View-5 of EUT Internal View-6 of EUT Report No.: AGC15733260402AP02 Page 5 of 11 Internal View-7 of EUT Internal View-8 of EUT Report No.: AGC15733260402AP02 Page 6 of 11 Internal View-9 of EUT Internal View-10 of EUT Report No.: AGC15733260402AP02 Page 7 of 11 Internal View-11 of EUT Internal View-12 of EUT Report No.: AGC15733260402AP02 Page 8 of 11 Internal View-13 of EUT Internal View-14 of EUT Report No.: AGC15733260402AP02 Page 9 of 11 Internal View-15 of EUT Internal View-16 of EUT Report No.: AGC15733260402AP02 Page 10 of 11 Internal View-17 of EUT Internal View-18 of EUT BT Antenna Report No.: AGC15733260402AP02 Page 11 of 11 Internal View-19 of EUT Battery View of EUT ****************************************End of Report*************************************

Klein Electronics, Inc. 349 N. Vinewood St Escondido, California United States 92029 Attestation Statements Not Covered Entity Applicant & Not Covered Equipment To: Federal Communications Commission Date: May 27, 2026 7435 Oakland Mills Road, Columbia, MD 21046, USA Ref: Information Required by Section 2.911(d)(5)(i) & (ii) FCC ID: U7GBBGOKP Klein Electronics, Inc. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List, established pursuant to § 1.50002 of reference chapter, as an entity producing “covered” communication equipment. The equipment for which authorization is sought is not “covered” telecommunications equipment and video surveillance equipment produced by entities identified on the Commission’s Covered List that prohibited from receiving an equipment authorization pursuant to section § 2.903 of the FCC rules. Sincerely yours, Name: Michael Lopez Title: Manager

Report No.: AGC15733260402AP02 Page 1 of 5 EXTERNAL PHOTOS All View of EUT Top View of EUT UHF Antenna Report No.: AGC15733260402AP02 Page 2 of 5 Bottom View of EUT Front View of EUT Report No.: AGC15733260402AP02 Page 3 of 5 Back View of EUT Left View of EUT Report No.: AGC15733260402AP02 Page 4 of 5 Right View of EUT Port-1 View of EUT Report No.: AGC15733260402AP02 Page 5 of 5 Adapter View of EUT ****************************************End of Report*************************************

Klein Electronics, Inc. 349 N. Vinewood St Escondido, California United States 92029 Date: May 27, 2026 FCC Part 90 Letter FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Declaration of compliance to the requirements of §90.203 FCC ID: U7GBBGOKP Dear Sir/Madam, We, Klein Electronics, Inc. , acknowledge that this device will not be marketed to USA users with the frequency band which is not allowed by rule part 90.203 and it is a violation of FCC rules if this device is operated on unauthorized frequencies inside the U.S.A. This equipment meets the requirements of the FCC Rules, Parts 90.203(e) and (g), as applicable. Programming of this products transmit frequencies can be performed ONLY by the manufacturer or by service or by maintenance personal. The operator can’t program transmit frequencies using the equipment’s external operation controls. This is to certify that the requirements of 47 CFR Part 90.203(j)(4) and (5) spectrum efficiency are met by the Klein Electronics, Inc. demonstrated by the tests conducted on the sample radio provided. The tests show that the 4FSK data rate is in accordance with ETSI TS 102 361-1, that is 9600 bits per second in a 12.5 kHz bandwidth to satisfy the data rate requirement of 4800 bits per second per 6.25 kHz of channel bandwidth (7K60F1D emissions). Additionally, the radio uses the AMBE+2 half-rate vocoder to compress 60ms of normal bursts are sent in alternate 30ms TDMA slots and so comply with the equivalence of one voice channel per 6.25 kHz bandwidth (7K60F1W emission). Additionally, the radio also meets the requirement of one voice channel per 12.5 kHz of channel bandwidth for analogue speech (11k0F3E emission). Sincerely Yours, Signature: Name: Michael Lopez Title: Manager

Klein Electronics, Inc. 349 N. V inewood St Escondido, California United States 92029 Date: May 27, 2026 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Extended Frequencies Justification for Certification of Transmitter FCC ID: U7GBBGOKP Dear Sir/Madam, This transmitter was designed to operate…

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