This is the Savox SW2290SG-BE Waterproof Premium Brushless Digital Servo, a powerful "Monster" performance series from Savox that utilizes an all aluminum case, 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:(LxWxH)(mm): 40.3x20.2x38.7mm
Weight:81g
Operating Temperature:14° - 122°F (-10° - 50°C)
Running Current (no load):180mA @6.0V, 220mA @7.4V, 220mA @8.4V
Stall Current (at locked):7500mA @6.0V, 9200mA @7.4V, 10500mA @8.4V