BETAFPV Micro RF TX module is based on the ExpressLRS project, an open-source RC link for RC applications. 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.

A ton of ExpressLRS items are available now!

Bullet Points

Made of high-quality plastic material. It is very durable and stable.
Upgraded case designed. The USB port size is 6.5*13.5mm, which is compatible with 90% of the known USB Type-C cables.
Two case colors options for ELRS Micro TX Module. You can make your own TX module easily.
The cooling fan plays an important role in the ELRS Micro Module heat sink and performs very well in testing. Therefore, the module can work properly in daily use and need not worry about the temperature.
Please note that the module case and cooling fan should be bought separately. Recommending buying together for your DIY module.

Specification

Item: ELRS Micro TX Module Case / Cooling Fan
Case Weight: 20g
Cooling Fan Weight: 6g
USB Port Size: 6.5*13.5mm
Cooling Fan Size: 25.5*25.5*10.7mm
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

Diagram

BETAFPV Micro RF TX module is compatible with radio transmitter which has the micro module bay (AKA JR/SLIM module bay, e.g. Frsky Taranis X9D、TBS Mambo).

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.

3D-Printed Case

The 3D-printed case is unique and special in its appearance compared with the commercial version. Besides, ELRS Micro Module 1W with this 3D-printed case will be released as a limited edition soon.

Now the STL file for this 3D-printed case is released and free to download on our website for the ones who want to modify their case.

Link to STL file:
https://support.betafpv.com/hc/en-us/articles/4409821458841

Cooling Fan Performance

We have tested the temperature. With 500mW maximum RF output and 30 minutes powering on, the temperature of the RF chip can be kept under 50 degrees Celsius and about 30 degrees for the case. It proves that the module can perform properly in daily use and need not worry about the temperature. Also, for the black version (maximum 1W), the temperature can be kept under 65 degrees, with a heat sink in our testing. Results are also showing that the temperature of the RGB LED would be 10 degrees higher for both 500mW and 1W RF module. This is the reason why the cooling fan component is needed in this situation.

There are also questions raised should the fan be blowing air inward or outward. Our testing results show that the only temperature difference would be shown on the JR case, as the electronic components inside remain unaffected.

Know More About ExpressLRS

ExpressLRS is an open-source RC link for RC applications. Everyone could find this project on Github or join the discussion in Facebook Group.

ExpressLRS is based on Semtech Lora SX127x or SX1280 hardware for RX and TX respectively. it aims to achieve the best possible link performance in both speeds, latency, and range. At 900 MHz a maximum of 200 Hz packet rate is supported. At 2.4 GHz a blistering 500Hz is currently supported with a custom OpenTX build. This makes ExpressLRS one of the fastest RC links available while still offering long-range performance.

More and more vendors start to support the ExpressLRS radio protocol in different parts, like radio transmitter with ELRS in stock, drone with built-in ELRS receiver, ELRS TX module for JR bay, or Nano bay. BETAFPV team take part in this project and provide a series of ExpressLRS components.