This is a High Speed Digital Servo. It is designed to work with 550-700 Helicopters.

Features:
High Speed
Metal Gears

Specs:
Operating voltage range 6V-8.4V
Operating speed :
0.09sec@60°//6V
0.08sec@60°/7.4V
0.07sec@60°//8.4V
Torque :
14Kg-cm @ 6V
17Kg-cm @ 7.4V
20Kg-cm @ 8.4V
Weight 70g
Working Frequency:760us/333Hz
Ball Beaing : 2BB
17mm Coreless Motor
Size:40.5*20*39.5mm