Features: The best use voltage is 7.4V. It is recommended to use 2s battery for power supply (-8.4v). The working angle of the servo is 180 degree or 270 degree (PWM: 500us-2500us). gears, more wear-resistant, not easy to collapse and , etc. A great choice for university professors and students who are interested in developing software for robot parts. Tailored for RC hobbyists to provide different experiences and delight. If there are any problems, please our store in time. will give you a satisfactory solution. Specifications: Item: Digital Servo Speed: 0.17sec/60 degree at() 0.15sec/60 degree at(7.4v) 0.13sec/60 degree at(8.4v) Torque: 58kg.cm.at() 65kg.cm.at(7.4v) 70kg.cm.at(8.4v) Voltage: -8.4v Dead Zoon Setting: 3 Microseconds Wire Length: 320mm Size: 65*30*48mm(Servo) Package information: Package Size: 8.5*6.5*4cm Package Weight: 180g Gift Box Package Packing List: 1 *60kg Digital Servo(180°) 1* 18T Servo Arm 1* Some Fittings