1、Universal voltage, fit for 12‑84V electric bike or scooters, can identify voltage automatically, timely indicating 2、By turning the real‑time voltage value can accurately determine the amount of the remaining amount of electricity 3、To avoid traveling on the way without electricity and accurate judgment of the lithium battery is damaged 4、By turning the real‑time voltage value can accurately determine the judge the quality of lithium battery 5、Automatic to identification electric vehicles' voltage under 100V, universal used and real‑time display Description: Features:2. By turning the real-time voltage value can accurately determine the amount of the remaining amount of electricity. 3. To avoid traveling on the way without electricity and accurate judgment of the lithium battery is damaged. Specifications: Material: Aluminium Alloy + Rubber Wire Length: approx. 1.8m / 70.9" Type: 3 gears switch, high speed, middle speed, low speed (Adjust the speed of electric car, need controller to support)Compatible With: Suitable for 12V-99V Electric Bicycle Fitment: Fit for 22.2mm diameter handleWorking Voltage: Throttle DC0.8-4.2V, battery level indicator, 12-84V automatically identify. Application for any battery such as lithium battery , lead-acid battery Compatible With: Universal throttle for electric bike, scooter, tricycle, and other electric vehicle 7 Wires: Yellow is for power positive, usually connect with battery power + 24V 36V 48V 3 throttle wires : Red is for throttle positive + 5V Green is for twist throttle signal wire Black is for throttle negative The other three white blue and brown is for gears 3, please make sure your controller has 3 gears wire White is for high speed Blue is for middle speed shared line Brown is for low speed Package Included: 2 x Handlebars (1pc right handle, 1pc left handle grip) 1 x 1.8m Line Note: 1. Please notice that if your electric vehicle's controller doesn't support speed regulation, then this speed control switch has no effect. 2. When installing the non professionals, please pay attention to the line order, can not be connected to the wrong line, otherwise it is very easy to cause the burning of Holzer and LED tube. 3. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 4. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please in kind prevail.5.Please note that the product button color is shipped randomly. Common sense for battery voltage