Fangrui Product Details Usb Ports Used For Charging The Phone Real-time Battery Power Show Clearly And Accurately Color Full Lcd Display Waterproof Avg Speed, Max Speed, Speed(real-time). Total Kilometer/mile Distance , Time ,speed And Pas Level Indicator Speed Display:avg/max/real Time Speed Battery Indicator:reliable Battery Indicator 9-level Assist:3/5/9 Optional Mileage Indicator:odo/tirp/clock/time Usb Charging Port:5v/500ma Backlight:5 Levers Walking Mode:6km Brake Signal:on Display Headlight/backlight:on/off Temperature:suitable For Low Temperature Max -20degrees Celsius Screen:high-contrast 3.2 Inch Ips Colorful Matrix Screen Button:ergonomic External Button Design Easy To Operate Distance Display:kilometer/ Mile, Can Be Set According To Your Habits. Mileage Indicator:odometer/trip Distance/ Clock/ Riding Time Power Indicator:real Time Power Indicator , Digital Or Analog Or Current Software Upgraded:software Can Be Upgraded Through Uart Other:error Code Indicator Note: Do Not Plug In Or Unplug This Display When The Po