86-0755-61596687
312, Bldg. A, Hongdu Business Building, Zone 43, Baoan Dist., Shenzhen, Guangdong, China (Mainland)
Include in the package:
1pcs DM818 in uhf 400-470mhz
DMR818 is a 2W long distance DMR walkie talkie module, it comes with built-in highperformance 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 powersupply, 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 andconveniently embedded into various handheld device
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
Features:
UHF band frequency: 400~470 MHz
Distance up to 4~6Km
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)/Analog
Message transmission and receiption
Built-in EEPROM, data saved even powered off
1ppm TCXO crystal
51 CTCSS
166 CDCSS
9 adjustable volume
Application:
DMR walkie talkie module
Invisible intercom system
building security system
audio surveillance system
Electrical Specification
Product Show:
Typical Application Schematic:
Functions descriptions:
DMR818 has default 16 channels, CH1~CH8 in DMR mode, CH9~CH16 in analog mode. All the parameters can be configured by serial instructions. For details, please check “DMR818 communication protocol”.
Note: When module in radio killed mode, most of the serial instructions can’t be responded, It will return message 0x07 (Radio killed) or 0x01(Busy) to indicate.
Pin Definition:
Machinism Dimensions:
1)
Shipping
1. Items will be shipped within 3~5 days after we receive the full payment.
2. We do not guarantee delivery time on all international shipments due to differences in customs clearing times in individual countries, which may affect how quickly your product is inspected.
3. If you do not receive item within 60 working days (10 weeks), please contact us to investigate the case.
4. Please note that buyers are responsible for all additional customs fees, brokerage fees, duties, and taxes for importation into your country. These additional fees may be collected at time of delivery. We will not refund shipping charges for refused shipments.
We can provide EMS, DHL, Fedex, TNT China Register Post Air Mail and etc.
* All free shipping on our store are mostly China Registered Post Air Mail.
* If you need fast shipping like DHL or other, you will need extra payment, pls contact sales to evaluate the price.
1, Any inquiries will be replied in 12 hours.
2, OEM/ODM service.
* Customer's own logo is available;
* We help customer realize their own thinking, idea, design;
3,After-sale Service.
* All products passed QC before shipping;
* All products will be well-packed before shipping;
* All products have 1 year guarantee. Damaged item is free to change or
return in warranty period.
4, Payment Terms: T/T,Western Union/paypal/MoneyGram.
5, Shipping Company: China air post/HK,Singapore post/EMS/DHL/FEDEX.
A) Are you factory?
1)Yes, we are factory, we have our own R&D team, all products are developed by our own R&D team.
B) Do you offer technology support?
1) Yes, we offer technology support and ODM&OEM service.
Our company is engaged in researching, developing, producing and selling IOT(internet of things) products. We devoted ourselves on providing good RF modules, walkie talkie modules and integrated digital sensor modules. Meanwhile, ODM and OEM projects are welcomed. With more than 10 years experience of product design in RF and sensors, we have earned a good reputation among our customers.
