Feature:1. Powerful: Compared with other ordinary controller, ours is more stable, more efficient, lower current consumption and longer service life.2. Lamp Control: Equipped with double headed light wires, able to pick up the front and rear lamps, the instrument can turn on or off the lamp.3. Increase Driving Range: Reduce the temperature rise of the controller and increase the continuous driving range of the electric bicycle.4. Sensitive: Motor controller provides stable speed and sensitive control braking and directional change.5. Outer Housing: Controller housing is made of high quality aluminum alloy, and the trench design is for good heat dissipation, avoiding overheating.Specification:Item Type: Bike Motor ControllerMaterial: Aluminum AlloyApplication: For Electric Bicycle Conversion, 350W MotorProduct Size: Approx.9.4x6.1x3.5cm/3.7x2.4x1.4inWeight: Approx.315g/11.1ozRated Voltage: DC36V/48V UniversalRated Current: 8ALow Voltage Protection: DC30/400.5VMaximum Current: 171ASpeed Setting: 1-4.2VBrake Input: Low LevelMOSFETS: 6 MOSFETS.Package List:1 x Controller1 x ManualNote:Must be matched the instrument of for Quantum brand.