Features1[Clear Display] Bike thumb throttle with real time digital voltage display, accurate judgment of the remaining power, riding mileage. And according to the voltage to indicate the bike fault, intuitive, convenient. 2[Universal] This thumb throttle regardless of various models of electric bikes (12V to 99V universal), can be automatically identified, real time display. Does not distinguish lithium batteries, water batteries, dry batteries, etc. 3[Color Wire Description] Electric bicycle thumb throttle green wire is the grip for Hall signal wire, red wire is the grip positive 5v, black wire is the negative pole. Clear color distinction, convenient for your wiring. 4[Wiring Instructions] Thumb accelerator blue wire to the controller electric door lock out wire, yellow wire wire to the controller electric door into the power positive, (power switch, control the whole bike power). 5[ Material] This electric bike finger accelerator is made of ABS material, strong and durable, can be used for a long time. Compatible with most mountain bikes, folding bikes, scooters, etc.SpecificationItem Type: Bike Thumb ThrottleMaterial: ABSInterface: SM InterfacePackage List1 xBikeThumbThrottle