FCC ID: VSODM-4400 Digital 50W vehicle Radio

DM-4000 SERIES MOBILE RADIO PMN:Digital 50W vehicle Radio USER MANUAL VHF Transceiver DM-4100 DM-4200 UHF Transceiver DM-4400 Version #1 YEONHWA M TECH CO.,LTD 36, Jeonpa-ro, 44 beon-gil, Manan-gu, Anyang-si, Gyeonggi-do, Korea 14086 TEL:+82-31-444-7270 Table of Contents 1. Introduction Features 2. Specifications 3. Appearance 4. Controls & Keys 5. Message 6. Cautions 7. Warranty statement 2 1. FEATURES OF THE DM-4000 SERIES High-powered DM-4000 Series is a greatly designed compact Digital Mobile Radio. Embeded SFR (Single Frequency Repeater) function enables DM-4000 Mobile Radio to role as a Repeater and Base Station. An external accessory connector can be used in various ways. Main features of the DM-4000 Series VHF (50W) / UHF (50W) Maximum output power Output power (RF Power) can be controlled with 5 levels 2,048 Channels, 64 Zones ETSI Standard DMR Protocol Tier1, 2 Automatic DMR & Analog Mode Switching Call Recording Remote Radio Stun / Revive Transmitting and receiving text Message within 40 letters Mixed Channels (Digital & Analog) Data compatible between MOTO and HYT SFR (Single Frequency Repeater) - Optional Encryption (AES256, DMRA AES256 ) - Optional TX Interruption, Priority call- Optional External/Internal GPS - Optional BCL (Busy Channel Lock)/BCLO (Busy Channel Lock Out) Selectable Squelch Level (0~10) Heavy-Duty Microphone Internal or External Speaker Ignition Function / Horn Alert / Public Address / Talk Around 4W / 8 Audio Output OLED Display Power Source DC+12.0V 15%

3 2. SPECIFICATION 2.1 General Frequency Range Frequency Stability Programmable Channels Zone Channel Spacing Digital Vocoder Dimensions Weight Power Source DM-4100 : 136~174 MHz DM-4200 : 225~288 MHz DM-4400 : 400 ~470 MHz 1.5ppm (-30 to +60) 2,049 Channels 64 (1 Zone = Max 1,024 Channels) 12.5KHz AMBE++

144.5mm (H)165mm (W)172mm (D) 1.1Kg DC +12.0V Current Drain (Maximum) Receive mode, rated audio out 1A (Audio Max) Receiver Sensitivity Selectivity Transmit mode 11A Standby mode 300mA 0.25uV (BER 1%) 70dB (12.5KHz) Spurious & Harmonic Rejection 36 dBm (< 1GHz) -30 dBm (> 1GHz) FM Hum & Noise Ratio Audio Output Power Audio Distortion Audio Response Input Impedance Transmitter RF Power Output Spurious & Harmonic FM Hum & Noise Ratio Audio Distortion Audio Response Input Impedance 40dB (12.5KHz) 4 Watt/8 ohm load Less than 3%

+1, -3 dB from 6dB per octave de-emphasis Characteristic from 300 ~ 3000Hz 50 ohms 5/10/20/30/50Watt

-36 dBm (< 1GHz) -30 dBm (> 1GHz) 40dB (12.5KHz) Less than 3%

+1, -3dB from 6dB per octave pre-emphasis Characteristic from 300 ~ 3000Hz 50ohms 4 Appearance of DM-4000 Series Mobile Radio Figure 3-1`) DM-4000 series appearance 5 3.1 Dimension of DM-4000 6 3.2 Installing the Transceiver Figure 3-3) Parts & Installation 7 3.3 Package Contents DC power cable 15A Fuse(XM-1000, PM-2000) -----------------------------------------------------

Mounting Bracket

Screw set 5 x 16 mm self-tapping screw

Hex-headed screw with washer

Spring washer Flat washer Microphone (with cable)

ACC 708

Microphone hanger (with 4 x16 mm self-tapping screws)

Instruction manual

1 1 4 4 4 4 1 1 1 8 3.4 Terminal Description ACC (D-SUB 15 Pin Connector) Pin Name Description Specification I/O Remake Pin NO 1 RSSI DC Power Output 0.6~1.4V IGN Ignition Signal Input Power ON : 8V Power OFF : 6V R79 is selection LSP Low Speed Data R12 is selection EXT_SPK Loudspeaker Output 4, 4Watt AF_OUT Audio Output EXT_MIC Audio Input TXD/FCN1 TX Serial Data RXD/FCN2 RX Serial Data EXT_PTT External PTT 500mV 5 3.3V TTL 3.3V TTL 3.3V(H) : PTT OFF I/O 0V(L) : PTT ON F_AUDIO IF IC Output 100mV 10 COR/COS Squelch Output S.Q ON : 3.3 V S.Q OFF : 0V O I O O I O I O O 2 3 4 5 6 7 8 9 11 12 13 14 15 EXT/INPUT Programmable High Impedance I/O DC+5V DC Power Supply DC+5V Max 100mA HR1 HR2 GND Horn Alert Signal Output Max 3A Horn Alert Signal Output Max 3A Ground Ground O O O

Microphone Jack Pin Name Description Specification I/O Remake Pin NO 1 MBL Backlight of

Microphone DC+12.0V DC Power Output GND Ground Ground PTT/TXD0 PTT/PC Serial Data 3.3V TTL ME MIC Ground MIC Ground 2 3 4 5 O O

I

9 6 7 8 MIC MIC Signal Input 600 HOOK/RXD0 HOOK/PC Serial Data 3.3V TTL I I DM MIC Data Detection High Impedance I/O Speaker Jack (3.5mm Phone Jack) 4Watt/4 Pin Name Description Specification I/O Remake Pin NO 1 SPO External Speaker 4Watt/4 2 GND Output Ground Ground O O DC Input Power Connector Pin Name Description Specification I/O Remake Pin NO Red DC+12.0V DC Power Output Black GND Ground Ground I I Antenna Connector Impedance is 50 10 4. Controls & Keys (Buttons) Figure 4-1) Controls and Buttons 4.1 Power ON/OFF Volume Switch Turn the power on/off switch clockwise to power on, then LCD display screen will start with a sound to make a beginning. Turn the power on/off switch counter-clockwise to power off, then LCD display screen will end with a voice guide Good-bye. And also audio volume level can be adjusted by turning the power on/off volume switch clockwise/counter-clockwise. The registered zone is selectable in order. With powered on, to select the desired zone, press the Power On/Off button for 1 second. 4.2 PTT Button Press the PTT button to transmit voice and release the PTT button to receive voice. It is recommended to talk putting 2~4 inches distance from the microphone. 11 4.3 Menu Button To enter the menu tree as displayed in Figure 4-2, press the MENU button. Press the to move to the right and press to move to the left. To enter the submenu, press the MENU button one more time. Figure 4-2) DM-4000 Menu Figure 4-3) DM-4000 Menu Tree 4.4 Menu / Button and Channel / Button Press the MENU button to enter and press / button to select from the menu list. And with power on, press / button to move UP / Down the channel. 4.5 Menu Exit Press Cancel/Return button to exit the current menu out. 12 4.6 Programming Button (P1, P2, P3, ) Programming buttons are newly added to enhance user convenience and these buttons can be set via CPS program. 4.7 Emergency Microphone Emergency microphone can be used in case of emergencies when the mobile microphone is unavailable. Emergency Microphone PTT button can be set via CPS program. 4.8 External Connector Jack External Connector Jack is used to connect a Mobile Hand-microphone, to program Software and to upgrade firmware. 4.9 LED Display LED indicates the operational status of the radio. LED will illuminate RED color when transmitting LED will illuminate GREEN color when receiving If the LED blinks GREEN, the frequency is the same but the color code does not match Low Battery: LED blinks RED with beep sound 5. Operating Instruction of DM-4000 Series 5.1 Menu selection Press Menu Button to enter the menu mode. 8 menus are selectable in order to set up the Radio according to usage purpose and environment. Figure 5-1) DM-4000 Menu 13 Caution) If no operation is running more than 25 seconds, the Radio will end the menu mode and will revert to standby mode. 5.1.1 Contact The Contact List provides a list of individuals, groups or all calls of which you can make a direct call. To initiate a call, select the Contacts section from the menu (or press the contact button for direct access), press the menu/enter button to see the list of contacts, press / buttons to the desired contact and press the PTT button to initiate the call. The lists of contacts can be set within the radio by the CPS program. ICONs shown in contact list

: Individual contact list (individual calls, individual messages can be sent)

: Group contact list (group call, group message can be sent)

: All contact lists (terminals with the same channel and color code are usable) 5.1.2 Text Messages If you are in another mode or miss a message, the message icon will be displayed indicating the new message has arrived. The Message selection offers the ability to perform one of three functions: Quick Message, Inbox, and Outbox. 1) Quick Text message The ability to send from a choice of 40 preset messages with up to 40 characters per text message. The preset messages can be set by the CPS program. Select Quick Text from the message menu by pressing the menu/enter button to view the registered message(s). Using the keys, select the message you want to send, and press the menu/enter button to see the contents of the message. Press the menu/enter button again to view the list of contacts, and using the keys, select the contact for the message to be sent. Press the menu/enter button and the message will be sent to the contact(s). 2) Inbox Inbox stores up to 10 received text messages; when the received messages exceed 10, the oldest message is cleared and the newest incoming message is registered. When a new message arrives, the contents will be displayed on the LCD screen. When you choose messages stored in the list, you can view the received messages and the caller ID that initiated the call. If you want to delete text message from the inbox, select delete all from within the inbox menu and press the menu button to delete all messages. 14 3) Outbox Outbox stores up to 10 outgoing text messages; when the outgoing messages exceed 10, the oldest message is cleared and the newest sent message is registered. When you choose messages stored in the list, you can view the sent messages and the caller ID to whom they were sent. If you want to delete text message from the Outbox, select delete all from within the outbox menu and press the menu button to delete all messages. 5.1.3 Call Logs This function allows the viewing of incoming and outgoing calls from individuals only. Any group call, all calls are not saved. The contents are managed in the same manner as in the inbox and outbox of the text message. 1) Inbox Inbox stores up to 10 received calls; when the received calls exceed 10, the oldest call is cleared and the newest incoming call is registered. When a new call incomes, the caller ID will be displayed on the LCD screen. If you want to delete caller ID from the inbox, select delete all from within the inbox menu and press the menu button to delete all IDs. 2) Outbox Outbox stores up to 10 outgoing calls; when the outgoing calls exceed 10, the oldest call is cleared and the newest outgoing call is registered. When a new call made, the caller ID will be displayed on the LCD screen. If you want to delete caller ID from the Outbox, select delete all from within the outbox menu and press the menu button to delete all IDs. 5.1.4 Call Recording This function is used to record the content of outgoing and incoming calls. Up to 63 conversations/recordings can be stored with each recording limited to 160 seconds. Call recording can be selected on the Setting menu. If you want to delete recordings, select delete all from the Record on the menu. 15 5.1.5 Scan This function provides the ability to turn scan on/off and to review the scan list as programmed into the radio via the CPS program. During the scan, set the channel on you desire to listen, and receive signal. If you want to make a call while scanning, set it via the CPS program. 1) Scan ON/OFF On/Off setting can be set in the Scan Menu 2) Scan List Scan list can be set via CPS program 5.1.6 ZONE Up to 64 zones (with up to 1,024 channels per zone) can be programmed into the radio via the CPS program. 5.1.7 Setting This function allows the change to the settings of Power Level, Voice Encryption, Lone Worker, Busy Channel Lock (BCL)/Busy Channel Lock Out (BCLO), Button (Keypad) Lock, Tones, LCD Backlight, LCD Brightness, LED Control, Screen and Language. 1) Power Level Power level can be set with 5 levels. 2) Voice Encryption This is a feature to encrypt the incoming and outgoing voice. Voice Encryption function for each channel can be set via CPS program and 128/192/256 Bit Encryptions are available. 3) Lone Walker This function can inform others about your safety within the time set in the menu. Set-up time is from 1 to 100 minutes. 4) BCL/BCLO This function prevents interference when the current channel is busy.

- Digital Mode 16 BCL On : if the current channel is busy, transmitting is prohibited.

- Analog Mode BCL On & BCLO Off : if the current channel is busy, transmitting is prohibited. BCL On and BCLO On : Transmitting occurs when it matches the received tone. 5) Button Lock This function locks the button to prohibit the accidental press of keys and buttons. When the keypad lock is set, all keys/buttons are locked except for the PTT button, the emergency button, and power ON/OFF button. If any of these buttons are pushed, the keypad lock will enable again after certain time from the pressing of the last button. Press the P1 button for 2 seconds to temporarily unlock. 6) Tones This function enables to setup and adjust volume and tones associated with volume, Dial, Message and Buttons.

- Volume can be adjusted.

- Dial Tone can enable or disable

- Test Message Alert Tone can enable or disable

- Button Tone can enable or disable.

- Starting Tone can enable or disable.

- Microphone Input sound can be adjusted.

- Fixed volume prevents volume change. 7) OLED LCD Backlight This function enables or disables the OLED LCD backlight ON/OFF. 8) OLED Contrast (Brightness) The function is to adjust the contrast/brightness of the LCD from 1 to 7 levels. 9) LED Control The function is to set the enable or disable the LED status display. It can be set via the CPS program. 17 10) Language The function is to select the language available. 11) Screen setting Wait screen is configurable as screen1, screen 2 and screen 3. 5.1.8 Radio Information A menu that shows the information of the device. 6. Precautions 6.1 Matters affecting the performance of the equipment. Dont remove the antenna from the radio and dont modify the antenna or make any changes to the antenna. Strong electronic waves emitted from the radio can have an effect on the performance of the radio if the antenna is modified and can cause the radio to have a defect not covered under warranty. Dont use other manufacturers accessories (such as rechargeable batteries, adapters, external speaker microphone and earphone, etc.). Unknown or unauthorized accessories may damage the radio and void the warranty. Dont disassemble or reorganize the radio. The disassembly or reorganization of your radio is punishable by law and can cause damage to the radio that will not be covered by the warranty. Dont use frequencies you do not have a permit for. Unauthorized frequencies is punishable by law. 18 Avoid excessive shock to the radio. Dont place the radio where the direct sunlight, humidity and/or the high temperature occurs, battery damage can occur in this environment. 6.2 Influences to the operations of Radio or other Equipment The Radio emits a strong electronic wave which may have an effect on the operation of other equipment and can also be affected by those other devices. If using radio in an area where medical equipment is being used, please get permission from relevant staff to prevent interference issues. Be careful when using your radio in a place where computers or other electronic devices are being used because the strong electronic waves from the radio can affect this equipment. 7. Safety Notes Please make sure to read the followings for safe and effective use of the Radio. Please keep the radio away at least 1 inch from the body. Do not touch antenna if it is damaged. Risk of skin burn can occur if the outside surface of antenna gets stripped out. Please be careful when putting the battery in a pocket or a bag. If you contact a conductive metal to a battery terminal, there is a heat and fire risk to your radio. Please dont listen to the radio at a high-volume level when using earphones. Loud volume may have a lasting bad effect on your hearing. It is recommended to adjust the volume step by step to the level you want after you set the radio volume of the radio at a low level. Please dont remove or replace or charge or discharge the battery in a hazard area where sparks could cause an electrical fire. Turn off the radio in areas where there is a strong electromagnetic force 19 WARRANTY CARD Thank you for purchasing DM-4000 Series. 1. This product has passed strict quality control and testing process. 2. Warranty is one year from original date of purchase. Failure of the product under normal operating conditions, during the warranty period may be repaired by YeonHwa M Tech Co.,Ltd or our authorized service organization free of charge. 3. For the following cases, some service fees will be charged. When repair occurs after the warranty period has passed. When the product is damaged due to users mishandling, abuse or improper operation. When the product is damaged due to users modification, attempted repair or otherwise access to sealed/non-user serviceable items. When the product is damaged due to fire, pollution, earthquakes and any other natural or unnatural conditions, accidents, etc. 4. Product and personal information PRODUCT NAME SIN NUMBER PURCHASE DATE PURCHASER NAME ADDRESS DM-4000 SERIES Please contact Yeonhwa M Tech below for Return Merchandise Authorization (RMA) number before you send your radio back for service. YeonHwa M Tech Co.,Ltd 36 Jeonpa-Ro, 44Beon-Gil, Manan-Gu, Anyang-City, Gyeongg-Do, Korea Tel: 82-31-444-7270 / FAX : 82-31-444-7271 20 FCC statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help. This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter. Radiation Exposure Statement To maintain compliance with FCCs RF Exposure guidelines, This equipment should be installed and operated with minimum distance of 100cm from your body. RF Energy Exposure Awareness and Control Information and Operational Instructions for Occupational Use Notice: this radio is intended for use in occupational/controlled conditions where users have full knowledge of their exposure and can exercise control over their exposure to meet the occupational limits in FCC and International standards. This radio device is NOT authorized for general population consumer use. Federal Communication Commission (FCC) Regulations When Digital 50W vehicle Radio is used as a consequence of employment, the FCC requires users to be fully aware of and able to control their exposure to meet occupational requirement. Exposure awareness can be facilitated by the use of a product label directing users to specific user awareness information. Your Digital 50W vehicle Radio has a RF Exposure Product Label. Also, your Digital 50W vehicle Radio Radio user manual includes information and operating instructions required to control your RF exposure and satisfy compliance requirements. Compliance with RF Exposure Standards Your Digital 50W vehicle Radio is designed and tested to compliance with a number of national and international standards and guidelines for human exposure to radio frequency electromagnetic energy. This radio compliance with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF exposure environments at operating duty factors of up to 50% talk 50% listen and is approved for occupational use only. In terms of measuring RF energy for compliance with these exposure guidelines, your radio generates measureable RF energy only while it is transmitting (during talking), not when it is receiving (listening) or in standby mode. Your Digital 50W vehicle Radio complies with the following RF energy exposure standards and guidelines:

United States Federal Communications Commission (FCC), Code of Federal Regulations;

Institute of Electrical and Electronic Engineers (IEEE) C95.1 International Commission on Non-lionizing Radiation Protection (ICNIRP) RF Exposure Compliance and Control Guidelines and Operating Instructions for Two-Way Radio Operations To control your exposure and ensure compliance with the occupational/controlled environment exposure limits, always adhere to the following procedures;

DO NOT remove the RF Exposure Label from the device User awareness instructions should accompany device when transferred to other users. Operational Instructions and Training Guidelines In front of the face, hold the radio in a vertical position with microphone (and other parts of To ensure optimal performance and compliance with the occupational/controlled environment RF energy exposure limits in the above standards and guidelines, users should transmit no more than 50% of the time and always adhere to the following procedures;

the radio including the antenna) at least 100 centimeters away from the nose or lips. Keep the radio at a proper distance is important to ensure compliance. Note: RF exposure decrease with increasing distance from the antenna. holder, or body harness for this product. Using approved body-worn accessories is important because the use of non-approved accessories may results in exposure levels, which exceed the occupational/controlled environment RF exposure limits Using only approved supplied or replacement antennas, batteries, and audio accessories, use of non-

approved antennas, batteries, and wired or wireless accessories may exceed the applicable RF exposure guidelines (IEEE, ICNIRP or FCC). Body Worn Operation; when worn the body, always place the radio in an approved clip, IC statement English Statement This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canadas licence-exempt RSS(s). Operation is subject to the following two conditions: 1, This device may not cause interference. 2, This device must accept any interference, including interference that may cause undesired operation of the device. Safety Information This equipment complies with IC radiation exposure limits set forth for an controlled exposure environment. When the talk bottom is pushed, it sends out radio frequency (RF) signals. The devices is authorized to operate at a duty not to exceed 50%. For body-worn operation, this radio has been tested and meets the IC RF exposure guidelines when used with manufacturer accessories supplied or designated for this product. Use of other accessories may not ensure compliance with FCC RF exposure guidelines. Use only the supplied antenna. Unauthorized antennas, modifications, or attachments could damage the transmitter and may violate FCC regulations. To maintain compliance with RF Exposure guidelines, This equipment should be installed and operated with minimum distance of 100cm from your body. Canada D claration Le pr sent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autoris e aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radio lectrique subi, m me si le brouillage est susceptible d'en compromettre le fonctionnement. l'information sur la scurit ce mat riel est conforme aux limites de dose d'exposition aux rayonnements nonc s pour contr l es l'exposition environnement.quand le parler bas est pouss , il envoie des signaux radio fr quence (RF). les dispositifs est autoris e exploiter, une obligation de ne pas d passer 50%. op ration port s sur le corps, la radio a t test et respecte les directives d'exposition aux IC RF utilis e avec le fabricant d'accessoires fournis ou d sign s pour ce produit. utilisation d'autres accessoires ne peut s'assurer de la conformit avec les lignes directrices sur l'exposition aux radiofr quences. utiliser uniquement la fournies antenne. les modifications ou les antennes de non autoris e, pourrait nuire l' metteur et peuvent violer les r glements de la IC. l' metteur environ 100cm de votre visage et parlez normalement, avec l'antenne a signal et loin. RF Energy Exposure Awareness and Control Information and Operational Instructions for Occupational Use Informations sur la sensibilisation et le contr le de l'exposition l' nergie RF et instructions de mise en service en vue de l'utilisation professionnelle Notice: this radio is intended for use in occupational/controlled conditions where users have full knowledge of their exposure and can exercise control over their exposure to meet the occupational limits in ISED and International standards. This radio device is NOT authorized for general population consumer use. Avis: cette radio est destin e tre utilis e dans des conditions professionnelles / contr l es o les utilisateurs ont une connaissance compl te de leur exposition et peuvent contr ler leur exposition afin de respecter les limites professionnelles d finies par la ISED et les normes internationales. Cet appareil radio N'EST PAS autoris pour un usage grand public. Innovation, Science and Economic Development Canada (ISED) Regulations When Digital 50W vehicle Radio is used as a consequence of employment, the ISED requires users to be fully aware of and able to control their exposure to meet occupational requirement. Exposure awareness can be facilitated by the use of a product label directing users to specific user awareness information. Your Digital 50W vehicle Radio has a RF Exposure Product Label. Also, your Digital 50W vehicle Radio user manual includes information and operating instructions required to control your RF exposure and satisfy compliance requirements. R glement sur l'innovation, les sciences et le d veloppement conomique Canada (ISDE) Lorsque la radio portative num rique 3W est utilis e la suite d'un emploi, la ISED exige que les utilisateurs soient pleinement conscients de leur exposition et en mesure de contr ler leur exposition pour r pondre aux exigences professionnelles. La sensibilisation l'exposition peut tre facilit e par l'utilisation d'une tiquette de produit orientant les utilisateurs vers des informations de sensibilisation sp cifiques. Votre radio Veicolo Digital 50W a une tiquette de produit dexposition aux RF. De plus, le manuel d'utilisation de votre radio portative Digital 3W comprend les informations et les instructions d'utilisation n cessaires pour contr ler votre exposition aux RF et satisfaire aux exigences de conformit . Compliance with RF Exposure Standards Your Digital 50W vehicle Radio is designed and tested to compliance with a number of national and international standards and guidelines for human exposure to radio frequency electromagnetic energy. This radio compliance with the IEEE (ISED) and ICNIRP exposure limits for occupational/controlled RF exposure environments at operating duty factors of up to 50% talk 50% listen and is approved for occupational use only. In terms of measuring RF energy for compliance with these exposure guidelines, your radio generates measureable RF energy only while it is transmitting (during talking), not when it is receiving (listening) or in standby mode. Your Digital 50W vehicle Radio complies with the following RF energy exposure standards and guidelines:

Innovation, Science and Economic Development Canada (ISED), Code of Canada Regulations;

Institute of Electrical and Electronic Engineers (IEEE) C95.1 International Commission on Non-lionizing Radiation Protection (ICNIRP) Conformit aux normes d'exposition aux RFVotre radio portative num rique Votre radio Veicolo Digital 50W est con ue et test e pour tre conforme un certain nombre de normes et directives nationales et internationales relatives l'exposition des personnes l' nergie lectromagn tique par radiofr quences. Cette radio respecte les limites d'exposition IEEE (ISED) et ICNIRP pour les environnements d'exposition professionnels / contr l s aux fr quences de service pouvant atteindre 50% de conversation - 50% d' coute et est approuv pour une utilisation professionnelle uniquement. Pour ce qui est de mesurer lnergie RF afin de respecter ces consignes dexposition, votre radio ne gnre une nergie RF mesurable quen cours de transmission (en conversation), pas en rception (coute) ou en mode veille.Votre radio Veicolo Digital 50W est conforme aux normes et directives relatives l'exposition aux nergies RF suivantes:Innovation, Sciences et D veloppement conomique Canada (ISDE), R glement sur le Code du Canada;Institut des ing nieurs lectriciens et lectroniciens (IEEE) C95.1Commission internationale de protection contre les radiations non ionisantes (ICNIRP) RF Exposure Compliance and Control Guidelines and Operating Instructions for Two-Way Radio Operations To control your exposure and ensure compliance with the occupational/controlled environment exposure limits, always adhere to the following procedures;

DO NOT remove the RF Exposure Label from the device User awareness instructions should accompany device when transferred to other users. Directives de conformit et de contr le de l'exposition aux RF et instructions d'utilisation pour les op rations radio bidirectionnellesPour contr ler votre exposition et garantir le respect des limites d'exposition professionnelle / en environnement contrl, respectez toujours les procdures suivantes.NE PAS retirer ltiquette dexposition aux RF de lappareilLes instructions de sensibilisation des utilisateurs doivent accompagner l'appareil lors de son transfert d'autres utilisateurs. Operational Instructions and Training Guidelines To ensure optimal performance and compliance with the occupational/controlled environment RF energy exposure limits in the above standards and guidelines, users should transmit no more than 50% of the time and always adhere to the following procedures;

In front of the face, hold the radio in a vertical position with microphone (and other parts of the radio including the antenna) at least 100cm away from the nose or lips. Keep the radio at a proper distance is important to ensure compliance. Note: RF exposure decrease with increasing distance from the antenna. Body Worn Operation; when worn the body, always place the radio in an approved clip, holder, or body harness for this product. Using approved body-worn accessories is important because the use of non-approved accessories may results in exposure levels, which exceed the occupational/controlled environment RF exposure limits Using only approved supplied or replacement antennas, batteries, and audio accessories, use of non-

approved antennas, batteries, and wired or wireless accessories may exceed the applicable RF exposure guidelines (IEEE, ICNIRP or ISED). Instructions op rationnelles et directives de formation Pour garantir des performances optimales et le respect des limites d'exposition aux nergies RF d finies dans les normes et directives susmentionn es, les utilisateurs ne doivent pas transmettre plus de 50% du temps et se conformer syst matiquement aux proc dures suivantes.En face du visage, tenez la radio en position verticale avec le microphone (et les autres l ments de la radio, y compris lantenne) au moins 100 cm du nez ou des l vres. Maintenir la radio une distance appropri e est important pour assurer la conformit .Remarque: l'exposition aux RF diminue avec l'augmentation de la distance par rapport l'antenne.Op ration port e sur le corps; Lorsque vous portez la carrosserie, placez toujours la radio dans un clip, un support ou un harnais approuv pour ce produit.L'utilisation d'accessoires approuv s pour le port du corps est importante car l'utilisation d'accessoires non approuv s peut entraner des niveaux d'exposition sup rieurs aux limites d'exposition RF des environnements professionnels / contr l s.Si vous utilisez uniquement des antennes, des batteries et des accessoires audio approuv s ou de remplacement fournis, l'utilisation d'antennes, de batteries et d'accessoires c bl s ou sans fil non approuv s peut d passer les consignes d'exposition RF applicables (IEEE, ICNIRP ou ISED).Instructions op rationnelles et directives de formation

Label & Label Location FCC ID: VSODM-4400 IC: 184A-DM4400 Model/HVIN: MDM-4424 Label Size39.5mm*50.5mm

YEONHWA M TECH CO.,LTD Add: 36, Jeonpa-ro 44beon-gil Manan-gu, Gyeonggi-do Anyang-si South Korea Date: 2021-8-19 FCC ID: VSODM-4400 Dear Sir/Madam, We, YEONHWA M TECH CO.,LTD Hereby declares the following statement for Federal Communications Commission, PCB board, circuit, structure and internal of these model(s) are the same, Only model number is different for these model:

Product name: Digital 50W vehicle Radio Model no.: DM-4400,MDM-4424,MDM-4424R,MDM-4424E,VR-4400,RCM-4000D Sincerely, Name/Title Company:

Address:

Phone:

Fax:

E-Mail:

HWAN-DAE KIM /CTO YEONHWA M TECH CO.,LTD 36, Jeonpa-ro 44beon-gil Manan-gu, Gyeonggi-do Anyang-si South Korea 82-2-3281-7271 82-2-3281-7271 rfsar@ltalab.com

CONFIDENTIALITY REQUEST for Certification Service in USA Federal Communication Commission Equipment Authorization Division, Application Processing Branch 7435 Oakland Mills Road Columbia, MD 21046 Date:<2021-8-19>

Pursuant to Paragraphs 0.457 and 0.459 of the Commissions Rules (47 C.F.R.) and Section 552(b)(4) of the Freedom of Information Act, we requests confidentiality for the following products:

FCC ID VSODM-4400 Model name DM-4400 For the product stated above, we request that the following information be held confidential;

Exhibits Long-Term Confidentiality Short-Term Confidentiality Short-Term Confidentiality Days External Photos Internal Photos Block Diagram Schematics Test Setup Photos Users Manual Parts List Tune Up Operational Descriptions The long-term confidentiality exhibits contain our trade secrets and proprietary information that could be of benefit to our competitors. The short-term confidentiality on the basis of ensuring that business sensitive information remains confidential until the actual marketing of our new device. If you have any questions, please feel free to contact me at the address shown below. Sincerely, Name/Title HWAN-DAE KIM /CTO Company:

Address:

YEONHWA M TECH CO.,LTD 36, Jeonpa-ro 44beon-gil Manan-gu, Gyeonggi-do Anyang-si South Korea 82-2-3281-7271 82-2-3281-7271 rfsar@ltalab.com Phone:

Fax:

E-Mail:

YEONHWA M TECH CO.,LTD 36, Jeonpa-ro 44beon-gil Manan-gu, Gyeonggi-do Anyang-si South Korea Federal Communications Commission Authorization and Evaluation Division Equipment Authorization Branch 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern:

2021-8-19 We, YEONHWA M TECH CO.,LTD the undersigned, hereby authorize Eurofins Product Service GmbH to act on our behalf in all matters relating to applications for equipment authorization FCC ID: VSODM-4400 including the signing of all documents related to these matters. Any and all acts carried out by Eurofins Product Service GmbH on our behalf shall have the same effect as acts of our own. We also hereby certify that no party to this application 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. Sincerely, Name/Title HWAN-DAE KIM /CTO Company:

Address:

YEONHWA M TECH CO.,LTD 36, Jeonpa-ro 44beon-gil Manan-gu, Gyeonggi-do Anyang-si South Korea 82-2-3281-7271 82-2-3281-7271 rfsar@ltalab.com Phone:

Fax:

E-Mail:

YeonHwa M Tech Co.,Ltd. 36, Jeonpa-ro 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do 14086 Korea 8/19/2021 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Extended Frequencies Justification Dear Sir/Madam, The Radio with FCC ID:

VSODM-4400 was designed to operate in the frequency bands 406.1

470 MHz aid To equipment YeonHwa M Tech 90 on the FCC Grant. authorization Co.,Ltd. other requesting in is countries the that which FCC accept the the United frequencies lists States 406.1 FCC 470 Grant MHz, for under Certification, FCC RulePart YeonHwa M Tech Co.,Ltd. part not by a we allowed acknowledge rule that the its radio attests 90. Per violation that the of the FCCs the FCC will not be KDB634817 this Rules marketed guidance, device USA to as an operates users with alternative on if the to frequency the listing unauthorizedfrequencies. exact bandwhich is frequencies, Frequency Range(MHz) 406.1-450 MHz 450-454MHz 456-460MHz 460-462.5375MHz 462.7375-467.5375MHz 467.7375-470MHz FCC Rule Part FCC Part 90 FCC Part 90 FCC Part 90 FCC Part 90 FCC Part 90 FCC Part 90 Also, equipment programming is the responsibility of Authorized Service Personnel, the radio complies with 47 CFR Part 90.203(e), in that the operator cannot directly program the transmit frequencies using the normally accessible external controls. Please contact me if you require any additional information. Sincerely, Signature Hwan-Dae Kim CTO Yeonhwa M Tech Co.,Ltd

YeonHwa M Tech Co.,Ltd. 36, Jeonpa-ro 44beon-gil, Manan-gu, Anyang-si, Gyeonggi-do 14086 Korea Date:

8/19/2021 To:

FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject:

Attestation statement regarding the Digital Mobile Radio spectrum efficiency OF TYPE FCC ID:

VSODM-4400 EQUIPMENT:

Licensed Non-Broadcast Station Transmitter Dear Sir or Madam We, YeonHwa M Tech Co.,Ltd. declare that the time division multiple access (TDMA) technology provides two paths in a 12.5 kHz channel bandwidth, thus meeting the one voice path per 6.25 kHz of spectrum requirement. This radio also provides data rate of 9600 bps in a 12.5 kHz channel, thus meeting the minimum data rate of 4800 bps in a 6.25 kHz channel. Please contact the undersigned if you have any questions or need any further information. Sincerely Yours, Signature:

Signature Hwan-Dae Kim CTO Yeonhwa M Tech Co.,Ltd