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 Walkera DEVO, HorizonHobby DSM2, Flysky, Esky, FrSky, Weili, Hubsan, HISKY, and Futaba SFHSS Assan. The module can more flexibly and conveniently control four different brands 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 CORTEX-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 CORTEX-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.