1、Digital Voltage Display: Real time digital voltage display is intuitive and convenient, and can accurately judge the remaining power, mileage. 2、Battery Level Display: The display accurately judges the battery level based on the voltage and indicates the condition of the vehicle. Let you travel with peace of mind. 3、Wire Connection: The green wire is Hall signal wire, red wire is positive 5V, black wire is negative wire, blue wire is connected to outgoing wire of electric switch, and yellow wire is connected to the positive terminal of incoming power supply of the controller switch (power switch , control the vehicle power). 4、12V to 99V Universal: Regardless of various types of electric vehicles (12V to 99V universal), they can be automatically recognized and displayed in real time. 5、Good Features: Handlebar throttle twist grip is regardless of lithium batteries, water batteries, dry batteries. General accessories for electric vehicles.