speed switches – High speed, medium speed and low speed, fit for most 22.2mm diameter handle Real-time Display – It is a digital data display, intuitive and convenient, you can accurately determine the static battery power and static distance AccuratelyJudge Battery??s Condition – By turning the real-time voltage value can accurately determine the judge the quality of lithium battery and the remaining amount of electricity Universal Voltage – This Bike Throttle Grip is fit for 12-84V electric bike or scooters, tricycle, and other electric vehicle. Also can identify voltage automatically, real-time display the data. (12V, 24V, 36V, 48V, 60V, 72V electric vehicles can be used directly, part of the 84V electric vehicles can also be used.) Aluminium Alloy Material – Smooth surface, make the driver comfortable during driving and give more guarantee on safety Product Description Can not read the detailed data when driving Do not know the remaining amount of battery electricity