Feature:1. Stable Performance: This RC servo steering engine features high accurate helical gear, wide working voltage DC68.4V, premium coreless motor.2. Programmable Servo: The RC gear servo has built in programmable PWM digital amplifier and 32 bit MCU with 14 bit magnetic encoder.3. Complete Accessories: The kit comes with a servo, servo arm, screw barrel, rubber pad and screws to meet your installation needs.4. Waterproof Shell: The servo motor adopts aluminum alloy heat sink housing, with IP67 waterproof grade, wear resistant and durable, long service life.5. Wide Application: Our 50KG coreless programmable servo motors are perfect for RC cars, robots, robotic arms, etc. with excellent performance.Specification:Item Type: Coreless ServoShell Material: Aluminum AlloyColor: BlackProduct Size: Approx. 40 x 20 x 38mm / 1.6 x 0.8 x 1.5inWorking Voltage: 6V-8.4VWorking Speed: 0.15sec/60 At 6.0V0.12sec/60 At 7.4V0.11sec/60 At 8.4VStall Torsion: 38.0kg cm At 6.0V45.0kg cm At 7.4V50.0kg cm At 8.4VConnecting Wire Plug: JR PlugPulse Width: 500-2500usecDeadband: 2usecApplicable: RC Remote Control Car, Robot, Robotic Arm, Etc..Package List:1 x Coreless Servo1 x Metal Servo Arm2 x Plastic Servo Arm4 x Screw Barrel4 x Rubber Pad6 x Screw