1、High Compatibility: Suitable for all types of electric vehicles, universal for a voltage range from 12V to 99V with automatic identification. Compatible with most 22.5mm/0.9in handlebars. 2、Wide Application: Has a wide application, no matter about the battery type is sealed or lithium battery, water battery or dry battery. 3、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. 4、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. 5、Cable Connecting: Red cable needs to connect to the positive 5V cable of handle, and the black line is for the negative, can not simply connect wires by colors, the wrong connection will cause damage to the controller or handle. Item Type: Electric Bicycle Thumb Throttle Material: Plastic Color: As Picture Shown Application: for Electric Vehicle Gross Weight: Approx.73g/2.6oz Features: 1 x Electric Bicycle Thumb Throttle