Specification: Material: Aluminium alloy Working Voltage: 36/48V ed Power: 1000W Current: 38A Low Voltage Protection: 31/42V Suitable for: electric bicycle, scooter, etc Size: Approx. 178 x 84 x 44mm / 7 x 3.3 x 1.7inch Weight: Approx. 676g Package List: 1 x Brushless Controller