Overview: This four-in-one tuner module integrates four RF chips, CC2500, NRF24L01, A7105, and CYRF6936, into one circuit board. It can identify the PPM signal output by a remote control, and then convert it into the corresponding remote control protocol to control the receiver or the aircraft. Currently, it supports protocols for , HorizonHobby DSM2, , , , Weili, , HISKY, and Futaba SFHSS Assan. The module can more flexibly and conveniently control four different of quad-copters, helicopters and fixed-wing aircraft. Since you continue to use the familiar remote control, the operation feel and flight experience are also better. color: Black material: plastic Note: The STM32 MCU have change to ARM, firmware is ARM -M Attention: We only TX module hardware. Its software is based on open source firmware, which is burned by us, and users should bear the risk of using it. Working Parameters: Working voltage: 5-9V Working current: 150mA Working frequency: 2.4G ISM band RF power: +22dBm Main control chip: ARM -M(128K ROM, 20K RAM) Package Contents: 1 x IRX4 Lite 4-In-1 Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.