Usage: Installation method: three rotating wires, red to the positive pole, black to the negative pole, green to the signal cable, separate yellow is the positive pole of the power supply. Cable function: The green cable is the signal cable for the handle hall, the red line is the positive 5V cable for the handle, and the black line is for the negative pole. The blue line is connected to the output line of the controller's electric door lock, and the yellow line is connected to the positive terminal of the controller's electric door power supply (switch, vehicle power supply control). Specification: Item Type: Bicycle Throttle Material: Plastic Color: As shown Application: for electric bicycle Gross Weight: approx. 359g/12.7oz Package List: 1 x Handle 2 x Keys Note: 1. Please connect the wires while using the controller -Check the function cable. The controller wires cannot be easily connected by color. Incorrect connection will result in damage to the controller or handle. 2. Please allow 1-3mm error due to manual measurement. Thank you for your understanding. 3. Monitors are not calibrated the same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.