Built-in high-sensitivity GPS chipM3 adopts high-sensitivity GPS chip, which supports Beidou, GPS and GLONASS fast global positioning systems. M3 doesn't need to set the time, you just need to set the time zone before use. After GPS positioning, the time will be automatically corrected according to the local time. The local time zone can be checked online.[ANTI-GLARE MONO LCD] 1.7-inch anti-glare MONO LCD, clearly visible from all angles in the sun, full-screen white backlight, night riding, whether in the sun or night, you can clearly see the data, never worry about the dark. (Press the top two buttons at the same time to turn on the backlight, the backlight level is 1).USB Rechargeable, Peak Run Time 8 HoursUSB Rechargeable, can be charged with any charging device with USB DC 5V port. After the backlight is fully charged, the usage time is 8 hours, and the GPS search signal may cause high power consumption, which is a normal phenomenon.Riding data displayThe device supports 9 kinds of common riding data display: riding time, current/average/max speed, speed comparison, current time, altitude, ODO, riding distance and total time. NOTE: Make sure your M3 is connected to GPS before riding.Store and view history recordsAutomatic storage, can store 30 riding records. Long press the right button to enter the historical data view; to exit the historical interface, also long press the right button. Tip: M3 GPS cycling computer does not support track storage and data uploading.