This twist grip using digital display battery voltage display the remaining battery power, regardless of lithium batteries, lead acid batteries, aqueous batteries, dry batteries, below 100V electric vehicles can be used, it can automatically identify the voltage, real-time display. Fit for 22.2mm diameter Handlebar. Suitable for 12V~84V E-bike. Specification: Product Size: 115 x 33mm. Cable Length: About 1.8m. Yellow Wire: Power + 12V-84V. Red Wire: +5V. Green Wire: signal. Black Wire: -. Blue Wire: I/O button,such as light, horn. White Wire: I/O button,such as light, horn. Please do not contact wrong wire. Note: Maximum voltage indicates fully charged. Low voltage indicates the battery runs out. Before the minimum voltage necessary to charge the battery. 12V electric car, the maximum voltage of about 12V, about the minimum 9V (battery is runs out.). 24V electric car, the maximum voltage of about 29V, the lowest of about 21V (charge). 36V electric car, the maximum voltage of about 42V, the lowest of about 29V (charge). 48V electric car, the maximum voltage of about 54V, the lowest of about 39V (charge). 60V electric car, the maximum voltage of about 72V, the lowest of about 49V (charge). 72V electric car, the maximum voltage of about 84V, the lowest of about 60V (charge). Package Included: 2 X E Bike Throttle Grip (With Wire). 2 X Keys