Feature:1. Universal for Batteries: Has no strict requirements about battery type, regardless of sealed, lithium battery, water battery or dry battery.2. High Compatibility: With automatic identification, can be applicable for all models of electric vehicles, universal for a range from 12V to 99V.3. Real Time Display: Real time digital voltage display, intuitive and convenient, can accurately judge the remaining power and mileage.4. Display Function: The display accurately determines the battery level based on the voltage and indicates the vehicle's condition. Digital voltage display, intuitive and accurate judgment of remaining cities and mileage, and according to the voltage indicates vehicle failure.5. Wire Function: Green wire is handle hall signal cable, the red line is the positive 5V cable of the handle, and the black line is for the negative pole. The blue line is connected to the output line of contorller electric door lock, and the yellow line is connected to the positive pole of the controller electric door power supply (power switch, control the vehicle power supply).How to Use:Installation method: three rotating wires, red to the positive pole, black to the negative pole, green to the signal wire, separate yellow is the positive pole of the power supply,Specification:Item Type: Bike Throttle GripsMaterial: PlasticColor: As Picture ShownApplication: for Electric BikeGross Weight: Approx.359g/12.7oz Package List:1 x Grip1 x Grip2 x KeyNote:Please wiring while checking controller functional cable, can not simply connect controller wires by colors, the wrong connection will cause damage to the controller or handle.