Welcome to Dak FPV!
Firmware on this RX is LBT, If you would like FCC Firmware, please let me know and I can flash it before sending it out. However it is recommended by FrSky to update your Transmitter to LBT due to reliability and range performance.
The FrSky ultra mini receiver R-XSR is the evolution of the popular full range XSR receiver. The ...
FrSky D16 mode
21.5*12*3.5mm(L x W x H)
Operating Voltage Range
Number of Channels
Up to 16CH from SBUS(CH1~CH15 for PWM,CH16 RSSI for FC)