Check the listing for details. 6V 1000RPMDC Motor w Encoder Speed Velocity Measurement. Condition: New. Listed at 28.86 USD. Small Speed Gear DC Motor GA12 N20 with Encoder Test Code Tray 6V, 1000RPM ±5% for Model Plane Name: GA12-N20 DC Geared MotorEncoder Test Wire Length: 150mm Shaft Size: 3mm x 9mm Output Shaft type: D typeTotal Size: 40 x 12 x 17mm Package includes: 1X GA12-N20 DC Geared Motor with Encoder Test wire How to wiring?Red - motor Power + (Exchange can control the motor positive and negative rotation)Black - coded power supply-negative (positive and negative )Blue - coded power + positive (positive and negative) White - Motor power-(Exchange can control the motor positive and negative rotation) Item specifics:Type: Gear MotorFunction : 6V dc motor speed controller,variable speed motor, used for Intelligent remote Control car, model plane, automatic, Boat, Home Appliance, Car.