REEFS LINK required for ProgrammingVoltage 4.8V - 8.4VInternal: Steel Gears / All CNC Aluminum CasingFeatures:Fully ProgrammableHigh Torque High Speed Brushless ServoWater ResistantMagnetic Angle SensorPulse Width Modulation ControlFully Programmable w/ REEFS SoftwareSpecifications:Bearing Type: 2 Ball Bearings / Weight: 2.0oz / 57.2gDimension: 1.6 x .79 x 1.0 (LWH) 40.8x20.2x26.5mmTorque: 278oz @ 6v/ 299oz @7.4v/ 313oz @8.4vSpeed: .07sec @6v/.06sec @7.4v/.057sec @8.4vSpline: 25T / Dead Band Width: 2s