Please join my Facebook group for updates and your questions.

BMK B2 Long Range RDT Transmitter

Regular price £55.00

Introducing the high-powered B2 Transmitter, designed for use with all 434MHz BMK Remote DT receivers. With an output power nine times greater than its predecessor, the B1, the B2 boasts a number of advanced features that set it apart. 

Each digital transmitter is equipped with its own transmission code and powered by an onboard Lithium Polymer battery. During the binding process, receivers learn the code, meaning that a single transmitter can be used with an unlimited number of receivers.


If you already have a B1 transmitter and connected receivers, you can send me your B1 code and I will program your B2 with the same code. This way, you can use both transmitters together without having to re-bind your receivers. Otherwise, each B2 transmitter has its own unique code.

*The maximum transmission time is 30 seconds. Then you must release the button and press it again to continue.

B1 RDT code


With your B2 transmitter, you will receive an optional 3D-printed ring. If you are worried about accidental button clicks, you can glue it around the button. Any contact adhesive (like UHU Por) will work.


The battery should last for approximately 10,000 DT, but you will hear a different Tx tone and four additional tones between transmissions when the battery is running low. Even when the battery is low, it should still be sufficient for approximately 200 DT, allowing you to complete the day without charging.

To charge the device battery, you can use a standard USB micro cable (not included). The charge LED will turn off when the battery is fully charged, which generally takes about 1.5 hours if the battery is completely empty.

* Please note that Li-Po batteries should be stored with less than 80% charge level. If not required, please avoid charging your device after a flight day.

Package Content:

  • a B2 Tx 
  • an Antenna
  • a Ring


  • Weight: 50g
  • Dimensions: 75mm x 50 mm x 20mm
  • Maximum battery life: ~1.5 hours continuous press/ 10.000 DT
  • Low Battery Warning: <3.3v (multiple flashes & alternating buzzer tones)


Questions and Trouble Shooting

  • The Transmitter LED is blinking fast and beeping with alternating tones
    Charge the battery.
  • The Transmitter is not working, no life sign
    Possible battery or button failure. Plug the USB cable into the charge port and press the button, It's a button failure if the device is still not working. Contact me.