This is the Savox SW-2290SG Monster Torque Brushless Steel Gear High Voltage Servo. The Savox Monster Torque servo utilizes a unique brushless motor and controller technology to boost power up to 35% over previous generation servos.
Features:
Waterproof (IP67)
Full Aluminum Case
3 Precision Ball Bearings.
Unique steel gears
Specifications:
Torque @ 6v - 45.0kg/624.9oz-in
Torque @ 7.4v - 55.0kg/763.8oz-in
Torque @ 8.4v - 70.0kg/972.1oz-in
Speed @ 6v - 0.16 sec/60 deg
Speed @ 7.4v - 0.13 sec/60 deg
Speed @ 8.4v - 0.11 sec/60 deg
Dimensions L x W x H (mm): 40.3 x 20.2 x 38.7
Weight: 81g