Item Type: DC Motor Speed Controller Material: Aluminum alloy Voltage: 37V Power: 800W1[BRUSH CONTROLLER] The brush controller has a voltage of 36V and a rated power of 800W, with stable and reliable performance. 2[ALUMINUM ALLOY] The brushed controller is made of aluminum alloy with recesses to ensure the internal circuitry away from thermal overload due to good heat dissipation. 3[PROTECTIVE FUNCTION] The brush controller has under voltage protection, over current protection, stall protection, etc. to ensure the use and safety of the electric bike. 4[EXCELLENT PERFORMANCE] Brushed motor controllers provide stable speed and sensitive control of braking and direction changes. 5[EASY WIRING] The wiring method of brush motor controller is simple, you just need to follow the wiring label, very convenient and quick. 1 x DC Motor Speed Controller