BetaFPV ELRS Micro 900MHz RC Transmitter Module -White

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  • $39.99

The BETAFPV Micro RF TX module is based on the Express LRS project, an open-source RC link. ExpressLRS aims to achieve the best possible link performance in both speeds, latency, and range. This makes ExpressLRS one of the fastest RC links available while still offering long-range performance. This is the 915mhz version and is great for long range flights. The 915mhz frequency is able to penetrate through objects much better than 2.4ghz.



  • Packet refresh rate: 25Hz/50Hz/100Hz/200Hz (915MHz/868MHz), 
  • RF output power: 100mW/250mW/500mW (915MHz/868MHz)
  • Frequency bands: 915MHz FCC/868MHz EU
  • Input voltage: 5V~12V
  • XT30 port: 5V~12V, recommend 2S(8.4V) battery, DO NOT support 3S(12.6V) or above 
  • USB port: Type-C

Note: Please assemble the antenna before power on. Otherwise, the PA chip in the Micro TX module will be damaged permanently. 

Note: Please DO NOT use 3S or above battery to power up the TX module via XT30 port. Otherwise, the power supply chip in the TX module will be damaged permanently.

About the firmware

The ExpressLRS offical project on Github does NOT support the OLED function for the moment. BETAFPV team will work with the ELRS team and make the official repository support the OLED and button function ASAP.

Please get the firmware from BETAFPV Github nowadays until ExpressLRS official support. In BETAFPV branch, the ExpressLRS protocol is V1.1.0 and NO binding phrase for the firmware.

NOTE: There are 2 known issues with this firmware currently. We will solve these 2 issues ASAP. If you find more other issue, feel free to leave a issue here.

  • Only support pressing function for the joystick.
  • When entering OLED menus page with long pressing, the connection between RF TX module and receiver will be lost, the connection will recover after exiting menus page automatically;

You could all use the ELRS official firmware V2.0-RC2 now, but lost the function of OLED and Joystick. We will work with the ELRS dev team and make the ELRS official firmware support the full function of the Micro TX Module. For the milestone, OLED will be supported in the V2.1 officially.

User manual of How to Flash Firmware of ELRS RX/TX.


  • 1x BETAFPV ELRS Micro TX module
  • 1x BETAFPV Moxon antenna
  • 1x Micro TX module user manual
  • 1x Spare USB data cable (Type-A to Type-C)