Features 1、No matter Lead-acid batteries, lithium batteries, water batteries, dry batteries. 2、All kinds of electric vehicle (12V to 99V) can be automatically identified and displayed in real time. 3、Through the voltage number to determine the fault of electric vehicle, twice the result with half the effort. 4、By turning the real-time voltage value can accurately determine the amount of remaining power, convenient for you to drive 5、The real-time voltage value can accurately judge whether the lithium battery is damaged. 6、The quality of lithium battery can be judged by the value of turning voltage to facilitate the factory to purchase qualified lithium battery. Condition: 100% Brand New Item Type: E-Bike Thumb Throttle Material: plastic Color: as picture shown Efficiency: ≥98% Hall grade: linear hall, high quality rubber, imported LED digital display lamp Quantity: 1 pair Specification: electric vehicle universal accessories Terminal length: 2 m by default Green is for throttle hall signal, red wire is for throttle +5v, black is negative wire; please connect according to controller function wire, U can not just match same color wire, if wrong connected that will damage your controller and throttle. 5 wires: blue wire connect with controller power lock output wire, yellow wire connected with controller electric switch input wire power positive, 6 wires: yellow connected with power positive, blue wire and white is is function wire(can work as reverse switch, horn switch, cruise switch, power lock and so on) 7 wires: yellow connected with power positive, blue is share wire, middle gear for 3 gears , white is high gear, brown is low gear. The above is common wiring way, if need made to order please connect with salesperson. Battery common sense: Installation method: 3 wires, red wire for positive, black wire for negative, green wire for signal, and yellow wire for power supply positive. How to maintain the lithium battery: Package List 1 Pair x E-Bike Thumb Throttle 2 x Keys 2 x Accessories