Compliant with most standard receiver connector:for Futaba, for Hitec, for , for etc... Great for truck, Boat, Racing Car, Helicopter and Airplane. Power Supply:Through External Adapter. Connector Wire Length 300mm For Original-box:NO Net weight:69g Operating Speed:0.17sec or 60 degrees (4.8V no load) Operating Speed:0.13sec or 60 degrees (6.0V no load) Stall Torque:13 kg-cm (180.5 oz-in) at 4.8V Stall Torque:15 kg-cm (208.3 oz-in) at 6V Operation Voltage:4.8 - 7.2Volts Gear Type:All Metal Gears Colour:As Shown Material:PlasticandMetal Size:40mm x 19mm x 43mm Package Contents: 1 x RC Upgrade Parts kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.