Spektrum AR6200 DSM2 6-Channel Receiver (Black) Full Range Aircraft Receiver of Channels:6 Modulation:DSM2 Band:2.4GHz Dimensions (WxLxH): 21.6mm x 30.1mm x 12.3mm Weight:10g Voltage Range:3.5V-9.6V Antenna Length: Main RX: 30mm (2) Remote RX: 30mm (2)