2 4G CC2500 NRF24L01 A7105 CTRF6936 4 IN 1 Multi protocol ARM TX Module with AntennaOVERVIEW This 2 4G Multi protocol TX Module is APM32 ARM microcontroller based module All available protocols are included in serial mode It is suitable for many brand of quadcopters helicopters and airplanes There are two modes to use the Module PPM mode and serial mode This module integrate four RF chips CC2500 NRF24L01 A7105 CYRF6936 into one single circuit board it supports a variety of remote control protocols such as Futabas S FHSS Walkera DEVO Spektrum DSM2 DSMX Flysky Frsky WLToys Hubsan Hisky Esky Assan etc You can control your craft flexibility with it and You will get much excellent experience with you favorite transmitter Description Item 4 IN 1 Multi protocol ARM TX Module With AntennaOperating voltage 5 14VOperating current 100mAOperating frequency 2 4G ISM bandRF power 22dBmMCU ARM CORTEX M 128K ROM 20K RAM Case not include be on sell laterSize 55x41x7mm button not includeWeight 23gVersion Flysky Frsky JR optional Normal use operation in PPM mode 1 Install RF Module in position Set PPM signal output on you transmitter 2 According to the default protocols table turn protocol switch of RF module to choose the protocol 3 After finish binding operation Power on your transmitter the red light of RF module will be on then RF module is ready to work after that power on your receiver or craft Binding operation in PP