iRangeX IRX4 Plus 2 4G CC2500 NRF24L01 A7105 CYRF6936 4 IN 1 Multiprotocol ARM TX Module With CaseNote The STM32 MCU have change to ARM firmware is ARM CORTEX M The new stock will be ARM Existing inventory is not affectedOverview 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 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 for Futaba 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 Specification Brand Name iRangeXItem Name IRX4 PlusOperating Voltage 5 14VOperating Current 100mAOperating Frequency 2 4G ISM bandRF Power 22dBmMCU ARM CORTEX M 128K ROM 20K RAM Weight 45gFeatures Two operation modes PPM mode and serial mode When in PPM mode there are 31 different protocols protocol NO 0 is reserved for serial mode mapping to the 16 position protocol selection switch on the module They are listed in the default protocols table below when the green light is off you can use the switch to choose protocol NO 1 to NO 15 when the green light is on you ca