VSODX-300Digital 2W Portable Radio

User Manual Version #1 (2023-05-30) UHF Transceiver DX-300 2 1. DX-300 Features With built-in antennas, the DX-300 is simple and easy to carry with it, as it fits perfectly in the palm of your hand. Swivel belt clips minimize inconvenience and provide convenience for users to act freely when the radio is attached to the body. DX-300 provides stress-free communication through activities such as hotels, restaurants, large shops, amusement facilities, and various leisure sports. ⚫ Digital (TierI, II TDMA) or Analog Mode. ⚫ 512 Channel Capacity; 1 Zones 16 (1zone = Max 16 Channels) ⚫ Mixed Channel Operation (Analog reception in Digital mode) ⚫ 2 / 0.5 Watt RF Power Setting ⚫ Encryption Mode (AES256) ⚫ Single equipment running Business Radio(DMR)/GMRS/FRS ⚫ Channel Announcement ⚫ Battery Remaining Announcement ⚫ Multiple Scan Modes ⚫ Time-Out Timer (TOT) ⚫ Safety mode(Lone Worker) ⚫ Emergency / Siren ⚫ Etiquette (Vibration) Function (Option) ⚫ Electronic volume control ⚫ Voice recording and playback ⚫ VOX (Voice Operated Transmit) ⚫ Remote Radio Stun / Revive ⚫ Built in Speaker & MIC ⚫ 1Watt Audio output ⚫ Swivel Belt Clip ⚫ 2 Pin accessory connector ⚫ Bright and vivid TFT LCD screen ⚫ IP67 waterproof ⚫ DC+3.7V Li-ion / 2,000Mah 3 2. Specification DX-300 General Frequency Range Frequency Stability Programmable Channels Channel Spacing Digital Vocoder Dimensions Weight Power Source Current Drain (maximum) DX-300 : 440 ~470 MHz ±1.5ppm 512 (1 Zones = Max16 Channels) 12.5KHz AMBE++ Voice Compression Algorithm 86mm(H) x 51.5mm(W) x 22mm(D) 100g DC +3.7V Li-ion 2,000mAH Battery Receive mode, rated audio out – 420 (Audio Max) Transmit mode – 1,200mA Standby mode – 100mA Receiver Sensitivity Squelch Sensitivity Selectivity Spurious and Harmonic Rejection FM Hum and Noise Audio Output Power Audio Distortion Audio Response Input Impedance 0.25uV 12 dB SINAD 0.22uV 10dB SINAD 60dB (12.5KHz) -57dBm(<1GHz), -47dBm(>1GHz) 40dB (12.5KHz) 1 Watt across an 8ohm load Less than 3% at rated output +1, -3 dB from 6dB per octave de-emphasis Characteristic from 300 ~ 3000Hz 50 ohms Transmitter RF Power Output Adjacent Channel Power Spurious and Harmonic FM Hum and Noise Audio Distortion Audio Frequency Response Output Impedance 1/0.5 Watt 60dB -36dBm(<1GHz), -30dBm(>1GHz) 40dB (12.5KHz) 3% maximum with 1KHz modulation +1, -3dB from 6dB per octave pre-emphasis Characteristic from 300 ~ 3000Hz 50ohms 4 3. DX-300 Package Contents Radio Unit Swivel Belt Clip 1 Slot Charger User Manual Figure 3-1) DX-300 Main Package Contents 5 4. Control Buttons & LCD Display Figure 4-1) Appearance DX-300 6 Figure 4-2) LCD Icon Explanation 5. Button and Jack Operations Button & Jack Operation Description Power ON/OFF Pressing the Power ON/OFF button will cause the MAXON logo to appear on the LCD and power on with a sound. Pressing the Power ON/OFF switch for more than 2 seconds with the Radio on will turn off the power with the "Goodbye" comment. On the menu mode, to return to the upper Menu, press the "Power On/Off" button. PTT Button The radio transmits voice when pressing PTT button. It receives Voice when releasing the PTT button. In order to have clear sound when transmitting, it is recommended to speak around 5~7cm away from the MIC. Volume UP Button If you press Volume/Channel UP Button with Radio turned on, the voice becomes louder one step at a time. Volume consists of a total of 16 steps. To select the Menu options, press the "Volume/Channel UP/down Button" to move from side to side menu. Volume Down Button If you press Volume/Channel Down Button with Radio turned on, the voice increases or decreases step by step. Volume consists of a total of 16 steps. To select the Menu options, press the "Volume/Channel UP/down Button" to move from side to side menu. Menu Button To Enter the Menu mode, press the "Menu Button". Digital mode provides three menu options such as Contacts, Record, and Settings. And Analog mode provides only the Setting option. On the menu mode, to dismiss the menu options and return to the welcome screen, press the "Menu button" for about 2 seconds. 2 Pin MIC Jack 2 Pin MIC Jack is used for : 1) the Accessory Speaker MIC 2) programming cable to set CPS Program 3) communicating with external terminals 7 6. Installation and Removal 6.1 Belt Clip Installation and Removal Please refer to figure 6-1. To attach the Swivel belt clip to DX-300, align the belt clip to the back of DX-300 as shown the figure 5-1 and push it down to direction 1. The clip will "click" when locked. To remove the belt clip, push the belt clip locking tab into direction 2 and pull the belt clip up to direction 3. In case the user wears the DX-300 around the waist, the belt clip can turn to direction 4 or 5 to make it more convenient. Figure 6-1) Belt Clip Installation and Removal 6.2 External Accessory Connector Jack To connect external accessories as shown in figure 6-2, open the accessory jack cover, align the DX-300 and the accessory, and then push-in the accessory. To remove the accessory, carefully pull-out the accessory connector from the middle of the connector and close the accessory cover to re-seal the jack. 8 Figure 6-2) Jack for an external Accessory 7. Charging the Battery When the DX-300 is inserted into the XC-400D charger, the LCD screen displays the state of charge and the battery Icon indicates the full charge when charging is complete. DX-300 can be charged by a USB C-type adapter for a mobile phone. 7.1 The Time of Charging Low battery voltage may reduce communication coverage and also degrade performance. Please charge the battery in case of the following: 1) When the performance has been degraded. 2) When the battery Icon blinks indicating low battery. 3) When you hear the 'Warning sound' during operation. 7.2 How to Charge DX-300 can be charged with an XC-400D charger and a USB C-type adapter for mobile phones. 1) Charging 9 Figure 7-1) XC-400D Charger 2) Charging with USB C-Type charger Inset a USB C-type adapter into …

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Yeonhwa M Tech Co.,Ltd 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 7/6/2023 U.S. Agent Designation Yeonhwa M Tech Co.,Ltd acknowledges their consent for the following contact located in the United States to act as their agent for service of process for the equipment for which authorization is sought (FCC ID: VSODX-300): Name and company of U.S. agent: Formates LLC Physical U.S. address of agent: 1400 Hudson St, Hoboken, New Jersey, 07030, USA FRN of U.S. agent: 0033456468 Email address of U.S. agent: [email protected] Formates LLC acknowledges their obligation to accept service of process on behalf of Yeonhwa M Tech Co.,Ltd. Yeonhwa M Tech Co.,Ltd with the FRN 0017098799 accepts its obligation to maintain an agent for service of process in the United States for no less than one year after either the grantee has permanently terminated all marketing and importation of the applicable equipment within the U.S., or the conclusion of any Commission-related administrative or judicial proceeding involving the equipment, whichever is later. By signing this form, we confirm the above and that we are aware of the application requirements listed under § 2.911(d)(7). The information provided in this letter is based on the referenced rule parts of Title 47 of the CFR as well as KDB 986446 D01. An expiration date for this letter does not exist. In case the U.S. agent changes, the grantee is obligated to notify the FCC within 30 days via the granting TCB. Sincerely, Signature Hwan-Dae Kim CTO {Applicant Company} Signature Abi Aribisala Project Manager Formates LLC 48_[mo del] US_Agent_2.911(d)(7) - U, V0 5

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 1 of 3 EXTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 2 of 3 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd. Page 3 of 3 Fig.5 Fig.6

Label & Label Location Label Size：27.5mm*16.0mm FCC ID: VSODX-300 IC: 184A-DX300 Model/HVIN: DX-300

Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 1 of 4 INTERIOR PHOTOGRAPHS OF EUT Fig.1 Fig.2 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 2 of 4 Fig.3 Fig.4 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 3 of 4 Fig.5 Fig.6 Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 This report shall not be reproduced except in full, without the written approval of Shenzhen Tongzhou Testing Co.,Ltd Page 4 of 4 Fig.7 Antenna

ReportNo.:AGC08217230601AP01 Page 1 of8 EUTPHOTOGRAPHS AllVIEWOFEUT TOPVIEWOFEUT ReportNo.:AGC08217230601AP01 Page 2 of8 BOTTOMVIEWOFEUT FRONTVIEWOFEUT ReportNo.:AGC08217230601AP01 Page 3 of8 BACKVIEWOFEUT LEFTVIEWOFEUT ReportNo.:AGC08217230601AP01 Page 4 of8 RIGHTVIEWOFEUT OPENVIEWOFEUT-1 ReportNo.:AGC08217230601AP01 Page 5 of8 OPENVIEWOFEUT-2 OPENVIEWOFEUT-3 PTT Antenna ReportNo.:AGC08217230601AP01 Page 6 of8 INTERNALVIEWOFEUT-1 INTERNALVIEWOFEUT-2 ReportNo.:AGC08217230601AP01 Page 7 of8 INTERNALVIEWOFEUT-3 INTERNALVIEWOFEUT-4 ReportNo.:AGC08217230601AP01 Page 8 of8 BATTERYVIEWOFEUT-1 BATTERYVIEWOFEUT-2 ----ENDOFREPORT----

Page1of18 CALIBRATIONDATA PROBECALIBRATIONDATA Page2of18 Page3of18 Page4of18 Page5of18 Page6of18 Page7of18 Page8of18 Page9of18 Page10of18 DAECALIBRATIONDATA Page11of18 Page12of18 Page13of18 DIPOLECALIBRATIONDATA Page14of18 Page15of18 Page16of18 Page17of18 Page18of18

Page1of41 SARTestReport ReportNo.:AGC08217230601FH01 FCCID: VSODX-300 PRODUCTDESIGNATION: Digital2WPortableRadio BRANDNAME: MODELNAME: DX-300,DX-300R,CP340,VR300D,RCD300,X300,MBR-400 APPLICANT: YeonHwaMTechCo.,Ltd. DATEOFISSUE: Jul.03,2023 STANDARD(S): IEEEStd.1528:2013 FCC47CFRPart2§2.1093 IEEEStdC95.1™-2005 REPORTVERSION: V1.0 AttestationofGlobalCompliance(Shenzhen)Co.,Ltd. ReportNo.:AGC08217230601FH01 Page 2 of 41 ReportReviseRecord ReportVersionReviseTimeIssuedDateValidVersionNotes V1.0/Jul.03,2023ValidInitialRelease ReportNo.:AGC08217230601FH01 Page 3 of 41 TestReport ApplicantNameYeonHwaMTechCo.,Ltd. ApplicantAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea ManufacturerNameYeonHwaMTechCo.,Ltd. ManufacturerAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea FactoryNameYeonHwaMTechCo.,Ltd. FactoryAddress36,Jeonpa-ro44beon-gil,Manan-gu,Anyang-si,Gyeonggi-do14086,Korea ProductDesignationDigital2WPortableRadio BrandName ModelNameDX-300 SeriesModelDX-300R,CP340,VR300D,RCD300,X300,MBR-400 DifferentDescription Allthesameexceptforthemodelnameandbrandname correspondingtoDX-300,DX-300R,CP340,VR300D,RCD300, X300; correspondingtoMBR-400 EUTVoltageDC3.7V ApplicableStandard IEEEStd.1528:2013 FCC47CFRPart2§2.1093 IEEEStdC95.1™-2005 DateofreceiptoftestitemJun.26,2023 TestDateJun.30,2023 ReportTemplateAGCRT-US-PTT/SAR(2021-04-20) Note:Theresultsoftestinginthisreportapplytotheproduct/systemwhichwastestedonly. PreparedBy TheaHuang (ProjectEngineer) Jun.30,2023 ReviewedBy CalvinLiu (Reviewer) Jul.03,2023 ApprovedBy MaxZhang (AuthorizedOfficer) Jul.03,2023 ReportNo.:AGC08217230601FH01 Page 4 of 41 TABLEOFCONTENTS 1.SUMMARYOFMAXIMUMSARVALUE...........................................................................................................5 2.GENERALINFORMATION................................................................................................................................6 2.1.EUTDESCRIPTION..........................................................................................................................................6 3.SARMEASUREMENTSYSTEM.........................................................................................................................7 3.1.THEDASY5SYSTEMUSEDFORPERFORMINGCOMPLIANCETESTSCONSISTSOFFOLLOWINGITEMS....................7 3.2.DASY5E-FIELDPROBE..................................................................................................................................8 3.3.DATAACQUISITIONELECTRONICSDESCRIPTION.................................................................................................8 3.4.ROBOT...........................................................................................................................................................9 3.5.LIGHTBEAMUNIT............................................................................................................................................9 3.6.DEVICEHOLDER............................................................................................................................................10 3.7.MEASUREMENTSERVER................................................................................................................................10 3.8.PHANTOM..................................................................................................................................................11 4.SARMEASUREMENTPROCEDURE.............................................................................................................12 4.1.SPECIFICABSORPTIONRATE(SAR)...............................................................................................................12 4.2.SARMEASUREMENTPROCEDURE.................................................................................................................13 5.TISSUESIMULATINGLIQUID.........................................................................................................................15 5.1.THECOMPOSITIONOFTHETISSUESIMULATINGLIQUID.....................................................................................15 5.2.TISSUEDIELECTRICPARAMETERSFORHEADANDBODYPHANTOMS...............................................................15 5.3.TISSUECALIBRATIONRESULT.........................................................................................................................16 6.SARSYSTEMCHECKPROCEDURE.............................................................................................................17 6.1.SARSYSTEMCHECKPROCEDURES..............................................................................................................17 7.EUTTESTPOSITION.......................................................................................................................................19 7.1.BODYWORNPOSITION..................................................................................................................................19 8.SAREXPOSURELIMITS.................................................................................................................................20 9.TESTFACILITY................................................................................................................................................21 10.TESTEQUIPMENTLIST................................................................................................................................22 11.MEASUREMENTUNCERTAINTY..................................................................................................................23 12.POWERMEASUREMENT..............................................................................................................................27 13.TESTRESULTS.............................................................................................................................................28 13.1.SARTESTRESULTSSUMMARY.............................................................…

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FCC Test Report Applicant Name: : Yeonhwa M Tech Co.,Ltd FCC ID : VSODX-300 Equipment Type : Digital 2W Portable Radio Models Name : DX-300,DX-300R, CP340, VR300D, RCD300, X300, MBR-400 Report Number : TZ230604468-E Date Of Receipt : June 16, 2023 Date Of Issue : June 30, 2023 Test By : (Anna Hu) Supervised by : (Hugo Chen) Approved by : (Andy Zhang) Tested by : Shenzhen Tongzhou Testing Co.,Ltd 1th Floor, Building 1, Haomai High-tech Park, Huating Road 387, Dalang Street, Longhua, Shenzhen, China The test report apply only to the specific sample(s) tested under stated test conditions It is not permitted to copy extracts of these test result without the written permission of the test laboratory. Page 2 of 51 Report No.: TZ230604468-E REPORT REVISE RECORD Revision Description Issued Data Remark Revision 00 Initial Test Report Release June 30, 2023 Andy Zhang Page 3 of 51 Report No.: TZ230604468-E CONTENT 1. TEST STANDARDS ............................................................................................................................................... 4 2. GENERAL INFORMATION .................................................................................................................................... 5 2.1. DIFFERENCE OF MODELS .............................................................................................................................................. 6 2.2. EUT OPERATION MODE ............................................................................................................................................... 6 2.3. BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................... 6 2.4. RELATED SUBMITTAL(S) / GRANT (S) .............................................................................................................................. 6 3. TEST ENVIRONMENT .......................................................................................................................................... 7 3.1. ADDRESS OF THE TEST LABORATORY ............................................................................................................................... 7 3.2. TEST FACILITY ............................................................................................................................................................ 7 3.3. ENVIRONMENTAL CONDITIONS ...................................................................................................................................... 7 3.4. TEST DESCRIPTION ...................................................................................................................................................... 8 3.5. STATEMENT OF THE MEASUREMENT UNCERTAINTY ............................................................................................................ 8 3.6. EQUIPMENTS USED DURING THE TEST ............................................................................................................................ 9 4. TEST CONDITIONS AND RESULTS ...................................................................................................................... 10 4.1. RF Power Output(Conducted Method) ............................................................................................................ 10 4.2. Modulation Characteristics ............................................................................................................................. 11 4.3. Occupied Bandwidth and Emission Mask ........................................................................................................ 20 4.4. Field Strength Spurious Emissions ................................................................................................................... 36 4.5. Conducted sprious emission result(at antenna terminal): ............................................................................... 39 4.6. Frequency Stability .......................................................................................................................................... 46 4.7. Transient Frequency Behavior ......................................................................................................................... 48 Page 4 of 51 Report No.: TZ230604468-E 1. T E S T S T A N D A R D S The tests were performed according to following standards: FCC Part 2: FREQUENCY ALLOCA-TIONS AND RADIO TREATY MAT-TERS; GENERAL RULES AND REG-ULATIONS FCC Part 90: PRIVATE LAND MOBILE RADIO SERVICES. ANSI/TIA-603-E-2016: Land Mobile FM or PM Communications Equipment Measurement and Performance Standards. ANSI C63.26-2015: IEEE/ANSI Standard for Compliance Testing of Transmitters Used in Licensed Radio Services Page 5 of 51 Report No.: TZ230604468-E 2. G E N E R A L I N F O R M A T I O N Models Name DX-300,DX-300R, CP340, VR300D, RCD300, X300, MBR-400 Difference description See 2.1 of this report Test Model DX-300 Applicant Yeonhwa M Tech Co.,Ltd Address 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Manufacturer Yeonhwa M Tech Co.,Ltd Address 36, Jeonpa-ro, 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, korea 14086 Equipment Type Digital 2W Portable Radio Trade Mark , Hardware version: XB14-R3 Software version: V2.5.2.0 Extreme Temp. Tolerance -10°C-+55°C EUT Power Rating DC 3.7 V by battery Operating Frequency 440 MHz – 470 MHz Channel Spacing 12.5 KHz Modulation Type FM, 4FSK Emission Designation FM VOICE:11K0F3E 4FSK VOICE:7K60F1E 4FSK DATA:7K60F1D Antenna Type: Internal Antenna Antenna gain: 0.0 dBi Data of receipt June 16, 2023 Date of test June 16, 2023 to June 29, 2023 Deviation None Test Sample ID TZ230604468-1# Condition of Test Sample Normal Page 6 of 51 Report No.: TZ230604468-E 2.1. Difference of Models Model(s) Brand name Function Difference description Appearance DX-300,DX-300R, CP340, VR300D, RCD300, X300 LCD Type All the same except for th…

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Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 TEST SETUP PHOTOS OF THE EUT Radiated Emission Below 1GHz Radiated Emission Above 1GHz Shenzhen Tongzhou Testing Co.,Ltd FCC ID: VSODX-300 RF conducted Test