1、Digital Voltage Display: Real time, intuitive and convenient! You can accurately determine the remaining power and driving range. 2、Judging Condition: The display can accurately judge the battery level and indicate the bike condition based on the voltage. Help you avoid traveling on the way without electricity and accurate judgment of the battery is damaged. 3、12V to 99V Available: Electric bike throttle grip is universal design, and suitable for various models of electric bikes, 12V to 99V universal. Throttle grip can be automatically recognized and displayed in real time. 4、Correct Installation: The green line is the Hall signal line, the red line is the positive 5V, the black line is the negative pole, the blue line connects the controller electric door lock out line, the yellow line line connects the controller electric door into the line power positive pole (power switch, control the whole car power). Please be sure to control the controller function line wiring, not simply and the controller color wiring, once the wrong connection will cause damage to the controller or handle. 5、Applicable to All Kinds of Batteries: Electric bike throttle grip does not differentiate between acid battery, lithium battery, water battery, dry battery.