DSM2 backward compatible but must use DSMX compatible primary receiver.

1) This is not a Spektrum DSMX or DSM2 product, nor is it a copy of a Spektrum DSM2 or DSMX product. The Spektrum, DSMX and DSM2 brand is a trademark of Horizon Hobby, Inc.
2) This is not an underground black market fake Spektrum product. Lemon Rx quality is guaranteed.
3) Lemon Rx products are tested to be compatible with Spektrum's DSMX and or DSM2 product (Spketrum, DSMX and DSM2 are the registered trademark of Horizon Hobby, Inc.).

Highlight
- True diversity dual antennas with independent processor for monitoring singal on both antennas
- Antennas extended for carbon fuselage / metalic structure installation

Specification

Type: DSMX Compatible Satellite Full Range Receiver with Diversity Antenna
Modulation: DSMX Compatible (Also DSM2 backward Compatible)
Band: 2.4 GHz
Dimension: 1.7(L) x 1.5(W) x 1(H)  cm
Weight: 2.7 gram
Voltage Range 3.3V from Receiver