How to Use: Controller description: The function can be realized by connecting the line color definition interface of the controller to the socket of the accessories. For specific operation, please refer to the wiring diagram and instruction manual. Controller cable color definition: 1. Red and black single cable: power cable 2. Black single thick cable (9 pin) : motor cable 3. Black single cable (9 pin) : 1 to 2 cable 4. Black single cable (3 pin) : power assist sensor cable 5. Black single cable (2 pin) : light cable Specification: Item Type: Electric Bike Conversion Kit Material: Aluminum Alloy + ABS Plastic Color: As Picture Shown Application: for 250W, 350W Bicycle Motor Gross Weight: Approx.545g/19.2oz Product Size: Controller Box 82x52x30mm/3.2x2.05x1.2in, Panel 81x48mm/3.2x1.9in Controller Rated Voltage: 36V DC /48V DC Controller Maximum Current: 15A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level BOOSTER: 1:5 Applicable Motor Power: 250W, 350W Connector Type: Fully Waterproof Connector S866 instrument working voltage: DC 24V, 36V, 48V, 60V compatible (instrument selection setting). Package List: 1 x Motor Controller 1 x Panel 1 x Panel Manual 1 x Thumb Throttle 1 x Power Assist Sensor 1 x Controller Wiring Manual 1 x 1 to 2 Cable Note: Conversion kit must be fully waterproof kit.