Features: The controller shell is made of aluminium alloy with design, which can protect the inner circuit due to good heat dissipation feature to avoid thermal overloading. 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. The interfaces have instruction labels on them your easy installation. Suitable electric bicycles, scooter, etc. Specification: Material: Aluminium alloy Rated Working Voltage: 36/48V Rated Power: 250W Current: 13A Low Voltage Protection: 31/42V Suitable Motor Phrase Angle: 60 / 120 degree Suitable : electric bicycle, scooter, etc Size: Approx. 9 x 5.3 x 3cm / 3.5 x 2 x 1.18inch Weight: Approx. 202g Fitment: Conventional brushless motor, speed not more than 3000rpm Package List: 1 x Brushless Controller Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.