Features: The controller shell is made of aluminium alloy with design, which can the inner circuit and good Compatible with heat dissipation to avoid thermal overloading. This item is a brushless motor controller, it can provide steady speed and sensitive control of braking and direction changes. Sine controller works smoothly and silently. The wires and interfaces are , and ensure low malfunction of long time use. The interfaces have instruction labels on them Compatible with your easy installation. Suitable Compatible with electric ycles, scooter, etc. Specification: Material: Aluminium alloy Working Voltage: 36/48V Rated Power: 1000W Current: 38A Low Voltage : 31/42V Suitable Compatible with: electric ycle, 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