Binding Instruction please see Pict no 4 Brand name: Frsky Item name: XM receiver Number of Channels:Up to 16CH from SBUS(CH1~CH15 for PWM, CH16 RSSI for FC Operating Voltage Range:3.5~10V Operating Current:20mA 5V Operating Range:>600m With RSSI output on board:Analog 0~3.3V Firmware Upgradeable Compatibility:FrSky D16 mode Dimension:15x10x3.5mm(LxWxH) Weight:1g