FrSky R-XSR Ultra Mini Redundancy Receiver You can click Here to buy the original connection cable altogether. ACCESS protocol firmware: Here OVERVIEW: The R-XSR is a standalone receiver with all the functions of XSR, in addition, it’s almost 1/3 size and 1/3 weight of XSR receiver. Moreover, there redundancy function is integrated into this tiny receiver ensures the security, and the IPEX connector makes it more convenient for you to replace antennas. SPECIFICATION (USER MANUAL): Dimension: 16*11*5.4mm (L*W*H) Weight: 1.5g Number of channels: 16CH (1-16CH from SBUS channel, 1~8CH from CPPM channel) Operating Voltage Range: 4~10V Firmware Upgradable Compatibility: FrSky X Series modules and radios in D16 mode FEATURES: Ultra mini size and light weight Support telemetry and Smart Port enabled Full range Switchable SBUS/ CPPM signal output Supports redundancy function IPEX connector, replaceable antennas Package included: 1* FrSky R-XSR receiver