Features:
Specially designed for Frsky transmitter, Incorporate CC2500 NRF24L01 A7105 CYRF6936 RF module in one single PCB board, supports more than 10 different protocols, such as Frsky, Flysky, WLtoys V2x2, Hubsan, Hisky and so on.
Control basically all of you toy-grade quad (Syma X1 X5C X8C X11 CX-10, H8C, Hubsan H107C H107D JXD 395 JJR/C 1000 X1 H21 H22 MJX X600 WLtoys V966 V262 V666 V676, to name a few) with one transmitter.
For this 4 in 1 module to work, soldering is required, if you're not comfortable with soldering, please practice first or have someone else to do it for you.
High quality and durable in use.
Features PA(Power Amplifier) and LNA(Low Noise Amplifier) for best performance.

Specifications:
Item Name: 4 in 1 RF module for Frsky Transmitter
4 In 1 Chip: CC2500, NRF24L01, A7105, CYRF6936
Compatibility: Supports dozens of protocols, such as Frsky, spektrum DSM2/DSMX, Walkera Devo, FUTABA SFHSS, Flysky, MJX, Wltoys, and etc.
Size: 5.5 * 4.1 * 2.2cm (just the board)
Weight: About 13g (just the board)

Supported Protocols:
- Flysky (Generation I protocol, based on A7105, tested)
- Hubsan (Based on A7105, tested)
- Frsky (Based on CC2500, tested)
- Hisky (Based on 24L01, tested)
- V2x2 (Based on 24L01)
- Dsm2 (Based on CYRF6936, tested)
- Devo (Based on CYRF6936, tested)
- YD717 (Based on 24L01 )
- KN (V977, Based on 24L01, tested)
- SymaX (Based on 24L01)
- SLT (Based on 24L01)
- CX10 (Based on 24L01)
- CG-023
- BAYANG
- SIMAX5C

Note:
The above protocols are transplanted from open source projects based on the remote control Walkera DEVIATION, the original author have tested almost the protocols, but he is not specially test for this 4 in 1 wireless module, the protocols our supplier tested have been stated above, untested protocols does not rule out is not supported, but there may be a problem of program configuration, so not rule out the subsequent firmware can support.

Open source protocol is mostly cracked, protocol version is constantly updated, inevitably there are omissions. Including but not limited to the following issues:
- Part program version DSM2 have protocol compatibility problems.
- Some receiver (original AR600) need to rebind per use, some receiver (spektrum integrated receiver) frame rate is a bit slow. This issue basically determine the problem is on the program itself.

Tested Ground Control Distance:
CC2500: V8FR receiver with Frsky protocol, about 240m.
A7105: WLToys V911 helicopter with Flysky 8 ch receiver, based on Flysky protocol, about 240m.
CYFR6936: Spektru m MCPX helicopter with DSM2 protocol, Walkera SUPERCP helicopter with DEVO protocol, about 200m.
NRF24L01: WLToys V977 helicopter with KN protocol, use Walkera DEVO transmitter, about 200m (If equipped with MCU baseplate, only 50m). Hisky HCP100S helicopter with Hisky protocol, about 70m.