1、Connection Wire: The green wire is the signal wire of the turning handle, the red wire is the positive 5V of the turning handle, the black wire is the negative wire, the blue wire is connected to the outgoing wire of the controller switch, and the yellow wire is connected to the positive terminal of the incoming power supply of the controller switch. 2、Scope of Application: The electric bike throttle handle grip can be automatically identified and displayed in real time regardless of the various models of electric bikes (12V to 99V universal). 3、Real Time Display: The real time digital voltage display, intuitive and convenient, can accurately judge the remaining power and mileage. 4、Wide Applications: Handlebar throttle grips are not divided into lithium batteries, water batteries, dry batteries. 5、Warm Tip: Please be sure to follow the instructions for wiring, do not randomly wiring, but a wrong connection will damage the throttle twist grip.