Features： 1、High Compatibility: Suitable for all types of electric vehicles, universal for a voltage range from 12V to 99V with automatic identification, improving your using experience. 2、Wide Application: Has a wide application, no matter about the battery type is sealed or lithium battery, water battery or dry battery. Compatible with most 22.5mm/0.9in handlebars. 3、Cable Connection: Red cable needs to connect to the positive 5V cable of handle, and the black is for the negative. Simply connect wires by colors is not allowed, the wrong connection will cause damage to controller or twist grip. 4、Display Function: The display can accurately judge the battery level and indicate the vehicle condition according to the voltage, as well as intuitively and accurately judge the mileage. 5、Real Time Display: Real time digital voltage display which is intuitive, convenient, can accurately judge the remaining power and mileage, good for your riding experience. Specification： Item Type: Electric Bicycle Thumb Throttle Material: Plastic Color: As Picture Shown Application: for Electric Vehicle Gross Weight: Approx.75g/2.64oz Features: 1. By turning the real time voltage value of the handle, you can accurately determine how much battery power is left 2. The real time voltage value of the switch can accurately judge whether the lithium battery is damaged Package List： 1 x Electric Bicycle Thumb Throttle