iRangeX R4X Pro 2.4G CC2500 NRF24L01 A7105 CTRF6936 4IN1 Multiprotocol External TX Module w/Battery iRangeX R4X Pro TX Module Features Flysky Version supports Flysky i6.i6x,i6s transmitter. Bulit-in a 3.7V 500mAh lipo battery,no more wiring except a PPM signal cable. Integrate four RF chips (CC2500,NRF24L01,A7105,CYRF6936) into one single circuit board. Supports industry standard PPM signal,it works […]