Power HD-3689MG High Speed Servo for 500 Helicopter - Black + Red
Torque (4.8V): 4.2 kg-cm; Torque (6.0V): 4.8 kg-cm; Speed: 0.10 sec (4.8V) / 0.09 sec (6.0V); Operating Voltage:4.8~6.0V DC; Bearing Type: 2 x Ball bearings; Motor Type: Coreless motor; Gear Type: Copper + aluminum; Operating Temperature: -20~60'C; Working frequency: 1520us / 333Hz; Suitable for RC 500 helicopter.