... (3-12v) 2.Speed:10-50rpm 3.Ratio:1:1000 4.Specs as voltage,ratio can be customized 5. ... Lock, Toys,Camera,MonitorReduction Ratio 1:10,1:20,1:30, 1:50, 1:63,1:100,1:150, 1:210 1:250,1:298,1:380,1:1000Specification: ModelReduction RatioVoltageNo LoadAt Maximum ... hesitate to contact with me if any more question. 6v 1:1000 ratio 5.5kg.cm high stall torque low rpm ...