1、Automatic Identification Function: Lithium battery, water battery and dry battery are not distinguished, which can automatically identify, and the diameter of handlebar is 2.3cm / 0.9in. 2、Wide Compatibility: Does not distinguish all types of electric vehicles, universal 12V‑99V electric vehicles. 3、Commonly Used Wiring Method: The green line is shifter hall signal line, the red line is shifter positive 5V, the black line is the negative pole, please be sure to compare the function wiring of the controller, not simply connect the controller wiring according to color, once the wrong connection will cause damage to the controller or handle. 4、5 Core Wire: The blue wire is connected to the output wire of the controller electric door lock, the yellow wire is connected to the input wire positive pole of the controller electric door lock, and the power switch controls the power supply of the vehicle. 5、Manufacturing Material: Made of high quality plastic material, it is strong and durable, which undoubtedly extends its service life. Item Type: Electric Bicycle Throttle Grip Weight: Approx.331g / 11.7oz Product Material: Plastic Efficiency: ≥98% Hall Grade: Linear HallHandlebar Diameter: Approx.2.3cm / 0.9in 1 x Handlebar Grips 1 x Shifters