Controller cable color definition: 1. Black single big head cable: waterproof motor wire (9PIN) 2. Red and black single big head cable: power cord 3. Red, blue, black, green and yellow single row 5 wire port: instrument cable 4. Red and blue cable (2) : power off brake handle cable 5. Red, black and white cable: thumb throttle cable 6. Brown, black and yellow cable: power sensor cable Specification: Item Type: Electric Bike Motor Controller Material: Aluminum Alloy + Plastic Color: As Picture Shown Application: for Bike Conversion Gross Weight: Approx.688g/24.3oz Product Size: Controller Box: Approx.126x66x38mm/5.0x2.6x1.5in, Panel: Approx.83x49mm/3.3x1.9in Controller Type: Square Wave Controller Controller Connector Type: Common Connector (Except Motor Waterproof Connector) Controller Rated Voltage: 36V/48V DC Controller Rated Current: 11A Controller Maximum Current: 22±1A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller Low Voltage Protection: DC 30/40±0.5V Applicable Motor Power: 500W