This item is a brushless motor controller, it can provide steady speed and sensitive control of braking and direction changes.The controller shell is made of aluminium alloy with groove design, which can protect the inner circuit and good for heat dissipation to avoid thermal overloading. Brushless controller is a good accessory for electric bike, scooter, etc. Bringing you a more comfortable riding experience. COMFORTABLE RIDING EXPERIENCE Brushless Controller Good accessory for electric bike, scooter, etc. Bringing you a more comfortable riding experience. GOOD HEAT DISSIPATION The controller shell is made of aluminium alloy with groove design, which can protect the inner circuit and good for heat dissipation to avoid thermal overloading. STEADY SPEED & SENSITIVE CONTROL This item is a brushless motor controller, it can provide steady speed and sensitive control of braking and direction changes. The wires and interfaces are durable, and ensure low malfunction of long time use. More efficient and more energy-saving. WONDERFUL ACCESSORIES Each interface has different color for your easy installation. Wonderful accessories suitable for electric bicycles, cars, motorcycles, mini bikes etc. Specification Material: Aluminium alloyWorking Voltage: 36/48VRated Power: 1000WCurrent: 38ALow Voltage Protection: 31/42VSuitable for: electric bicycle, scooter, etcSize: Approx. 178 x 84 x 44mm / 7 x 3.3 x 1.7inchWeight: Approx. 676g