Specifications: Type: Flybarless Control System Receiver # of Channels: 7 Modulation: DSM2/DSMX Band: 2.4GHz Length: 1.42 in (36mm) Width: 1.1 in (28mm) Height: 0.5 in (13mm) Weight: 0.66 oz (18.6 g) Voltage Range: 3.5V-8.5V Antenna Length: 110mm, 40mm