Features1High 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. 2Wide Application: Has a wide application, no matter about the battery type is sealed or lithium battery, water battery or dry battery. 3Display 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. 4Real Time Display: Real time digital voltage display which is intuitive, convenient, can accurately judge the remaining power and mileage, good for your riding experience. 5Cable 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.SpecificationItem Type: Electric Bicycle Thumb ThrottleMaterial: PlasticColor: As Picture ShownApplication: for Electric VehicleGross Weight: Approx.73g/2.6ozFeatures:Package List1 x Electric Bicycle Thumb Throttle