Package Contents: 1x Thumb Throttle with Power Switch LCD voltage display Technical Specifications: Material: Plastic Length: 150CM Work Voltage: DC 0.8V-42.V Fit for 22mm diameter Handlebar Thumb throttle with green or red color LCD display and key lock switch. Features and Benefits: 1:Suitable for all of Lithium battery, LiFePo4 battery and Lead acid battery. 2:Battery 12V-99V automatically Identify, Throttle DC 0.8-4.2V 3:Digital voltage display, intuitive and accurate judgment of remaining capacity, mileage. 4:Can indicate vehicle error according to voltage 5.blue wire connect with controller electric lock line, yellow wire connected with battery positive,throttle line connect to controller throttle lineļ¼red: throttle+, black: throttle-, green: throttle signal) The above is common wiring way Battery common sense: For this display Battery is measured by voltage. this throttle can work for any electric bike under 99v with lead acid battery, lithium battery, water battery, dry batter and so on. The throttle with automatically identify voltage. Due to the difference of battery material, battery conditions ( new or old, ),controller data , the battery voltage reaction will be different, so the data bellow will have deviation. Customers please check according to your battery to get your battery data. For 12v electric bike, max voltage is about 12.6v, mini is about 9v or higher, For 24 electric bike, max voltage is about 29.4v, mini is about 21v or higher, For 36v electric bike, max voltage is about 42v, mini is about 29v or higher, For 48v electric bike, max voltage is about 54.6v, /58.8v, mini is about 40v or higher, For 60v electric bike, max voltage is about 72v, mini is about 49v or higher, For 72v electric bike, max voltage is about 84v, mini is about 60v or higher,