This is a High Speed Digital Servo. It is designed to work with 450 Helicopters.

Features:
High Speed
Metal Gears

Specs:
Operating voltage range： 4.5V—6.0V
Operating temperature range： -20℃ to +60℃
Operating speed： 0.10 sec/60℃ 6V 0.12 sec/60 ℃ 4.8V
Torque： 2.0kg.cm 6V 1.8kg.cm 4.8V
Idle current: 5mA at stopped
Running current range： 50-150mA
Block up to turn electric current: 600mA
Dead band width： ≤4usec
Angle deviation： center :<±0.5 degree; angle ±40 degree, error :<±0.5 degree
Size： 22.5×11.5×24.6mm
Weight： 12g
Bearing material： Metal
Gear material： 4 metal gears and 1 nylon gear
Connector wire length： 21cm