Jumper JP4IN1 Multi Protocal Radio Transmitter Module Compatible Open TX for Frsky JRThe Jumper JP4IN1 Module features the CC2500, NRF24L01, A7105 & CYRF6936 RF Chip modules all integrated on one board. This module can convert standard PPM signals form module equipped radios in to the RF protocols used by most radios in the market today (See RF Chip data below). This module is plug & play with module equipped radios in the Fr SKY series & requires no complex wiring or hacking to get running. The module is a great way to improve the enjoyment of your flying experience, using a better radio such as the Fr SKY Taranis series rather than the low grade radios commonly included with most kits offers an night & day difference in performance. The Jumper JP4IN1 module is also upgradable via USB (Universal Serial Bus) input. Description: Brand name: Jumper Item name: JP4IN1 transmitter module Working voltage: 6-9v Working current: =100ma Operating frequency: 2.4G ISM band RF power: +22DBMMain control chip: STM32F103CBT6 (128K ROM, 20K RAM) Module bay compatibility: FRSky, Jr & other dimensions: 64*49*33 (without antenna) Net Weight: 42g (including antenna) Software Compatibility: Suitable for radios using Open TX or er 9x/ersky 9x Firmware updatable: Yes, via USB (Universal Serial Bus).RF Chip Data Cyprus Semiconductor CYRF6936: DSM/DSMX, Walkera Devo Texas Instruments CC2500: Fr Sky, SFHSSAmiccom A7105: Fly Sky, Fly Sky AFHDS2A, Hubsan Nordic Semiconductor NRF24L01: Hi Sky, Syma, ASSAN & most other Chinese models Link to Github repository:ht