Specs Dimension : 40.6mm x 20.4mm x 39mm. (180องศา) Net weight: 60g Operating Speed : 0.27sec/60° (4.8V) Operating Speed : 0.23sec/60° (6.6V) Stall Torque : 19.9kg-cm at 4.8V Stall Torque : 25.3 kg-cm at 6.6V Operation Voltage : 4.8 - 6.6 DC Volts Working Frequence:1520us/333hz Operating temperature: -20 C ~ 60 C Motor Type: DC Motor Gear Type: Copper& Aluminum Bearing Type: Ball bearing x 2 Digital: Yes Waterproof: Yes