Electric throttle grip kit for bikes with blue display screen and lock key 1、Display Screen: Eliminate analog power display (several small lights), real time digital voltage display, intuitive, convenient, can accurately determine the remaining power, driving mileage. 2、Strong Compatibility: This electric bike handlebar is compatible with acid batteries, lithium batteries, water batteries, dry batteries, regardless. 3、Replacement Parts: This electric bike speed control handle can be used as a replacement repair part to replace damaged original parts, or for modification. 4、Universal: Regardless of the various models of electric vehicles, 12V to 84V universal, are automatically identified, real time display, easy to use. 5、Installation: The green line is the hall signal line of throttle, red line is the positive 5V, black line is negative pole, the blue line is connected to the exit line of controller electric door, and the yellow line is connected to the positive pole of the controller electric door incoming line (power switch, control the power supply of the vehicle). Please be sure to check the controller's function line wiring, can not simply and the controller to the color wiring, once the wrong connection will cause damage to the controller or the handle.