Reefs 900 Smart Servo & Winch. Features: High Torque High Speed Brushless SERVO or WINCH Comes as SERVO out of the Box, can be changed to WINCH with the REEFS LINK and Software. BUILT IN PREPROGRAMMED WINCH CONTROLLER Internal Steel Gears / All CNC Aluminum Casing Magnetic Angle Sensor Pulse Width Modulation Control 4 Pole Brushless Motor REEFS LINK required for Programming BEC Not Req. Recommended for max performance Specifications:SUBMARINE WATERPROOF: 7 Point Seals w/ GRAY HEAT SINKVoltage: 4.8V 8.4VBearing Type: 4 Ball Bearings / Weight: 2.99ozDimension: 1.57 x .79 x 1.5 (LWH)Torque: 720oz @ 6v/ 830oz @7.4v/ 940oz @8.4vSpeed: .13sec @6v/.12sec @7.4v/.10sec @8.4vSpline: 25T / Dead Band Width: 2¦ÌsUnload Current: 460mA @ 4.8V / 500mA @ 6.0V / 540mA @ 7.4V / 580mA @ 8.4VLoad Current: 5000mA @ 4.8V / 5800mA @ 6.0V / 6800mA @ 7.4V / 7400mA @ 8.4V