1. Descriptions

DMR818 is a 2W long distance DMR walkie talkie module, it comes with built-in high performance microcontroller, digital mobile radio IC and RF power amplifier. All parameters(CTCSS,CDCSS, SQ, Predefined channels etc.) can be easily modified with protocol. With external power supply, speaker, and audio amplifier, it is easy to become a professional digital walkie talkie. Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld device.

DMR mode:

• Message transmission and reception.
• Message calling return receipt;
• Enhanced encryption of Voice and Text message.
• Various voice call types: All call, Group call and Private call;
• Reminder for input calling, calling status checking
• Emergency alarm and radio monitor;
• Radio kill and activate;
• Repeater

Analog mode:

• CTCSS/CDCSS configurable
• Squelch levels configurable

2. Features

• UHF band frequency: 400~470 MHz
• Distance up to 8Km
• Max power output to 2W,
• low power to 0.5W
• High Sensitivity: -124dBm
• Bit error rate down to 1% under -121dBm
• Independent frequency for Tx and Rx.
• Bandwidth: 12.5 / 25 KHz
• DMR(Digital Mobile Radio)/
• Message transmission and receiption
• Built-in EEPROM, data saved even powered off
• 1ppm TCXO crystal
• 51 CTCSS
• 166 CDCSS
• 9 adjustable volume

Order list:

• 2pcs DMR818 digital walkie talkie modules in 400-480MHz frequency

Note: before using DMR818 Digital walkie talkie module, our engineer advise that user should buy DMR828 Digital walkie talkie module to test function firstly, becuase DMR828 is all-in-one prossional digital walkie talkie module and built-in a DMR818 Board, It can be used as DMR818 Demo board. Here is the link for DMR828: https://www.tindie.com/products/NiceRF/2pcslot-dmr828-2w-digital-walkie-talkie-module/