1?��6 Core Wires : Uses 6 core wire, the yellow one is for the positive pole of the power supply, the blue and the white ones are functional wire (reverse switch, horn switch, cruise switch, power switch and other switches). 2?��Power: Regardless of lithium battery, water battery, dry battery, regardless of various types of electric vehicles, universal for a range from 12V to 99V with automatic identification function. 3?��Connection Wire: The green line is the hall signal line of the handlebar, the red line is the positive 5V of the steering, and the black line is the negative . 4?��Practical Function: Above 98% high efficiency, 3 speed(high, medium, low speed gear)adjustable. Ideal accessory for electric bicycle, suitable for 23mm diameter handle. 5?��Warm Tip: Please be sure to control the wiring of the controller's function line. You can't simply wire the color to the controller. If you connect it incorrectly, the controller or the handle will be damaged.