Note: 1. The best use voltage is 7.4v. It is recommended to use 2s battery for power supply (6v-8.4v) . 2. The working angle of the servo is 270 degree (PWM: 500us-2500us). Some remote controls can only output 1000-2000, it is recommended to buy 270 degree.. Sepcification:. Package contains:. 1 pieces of DS5160 Digital Metal Robotic Servo. ​1 pieces of 18T servo arm. one set of screw(see the picture. Size:65*30*48(servo). Weight:162g. Wire length:320mm. Speed: 0.17sec/60 degree at(6v). 0.15sec/60 degree at(7.4v). 0.13sec/60 degree at(8.4v). Torque: 58kg.cm.at(6v). 65kg.cm.at(7.4v). 70kg.cm.at(8.4v). Voltage: 6v-8.4v. Dead Zoon setting:3 Microseconds. Features:. - Durable Metal Gear. - Dual Ball Bearing. - Programmable Digital Amplifier with Mosft Drive. - Bottom Side Axial Mount Hole. - Original factory product. - Less Noise . -Contains: Long Holder Aluminum & Short Holder Aluminum & Circle Holder-18T & Circle Holder -Orientation . Angle:maximum 270 deg. Mechanical Angle :360 deg (Plug/Output wheel/Radio control system compatible with Futaba JR Hitec).