Features: High Torque Digital Coreless Servo Waterproof: 7 Point Seals Magnetic Angle Sensor Pulse Width Modulation Control Fully Programmable with REEFS Software (REEFS LINK Required For Programming) Steel Gears / All CNC Aluminum Casing Three Ball Bearings 434oz-in/0.10 sec @ 8.4V 25T Output Spline BEC Not Required (Recommended for Max Performance)