With Beidou, GPS and GLONASS satellites, acquire satellites quickly for accurate positioning. Only both press the back and right button to change the backlight brightness for easy viewing. Support real-time data display, including riding time, distance, current speed, altitude and ect. USB rechargeable design makes it can be charged anywhere. 400mAh lithium battery provides up to 8 hours run time. Suitable for use in small to medium rain environment, please close the charging port tightly during use in the rain. This wireless bike computer is very easy to install/remove via the supplied bike mount. Mini size: 2.36 * 1.7 * 0.8 inch.