Functional Overview:   Automatically wake up while riding Change battery data storage (20 seconds) Backlight function (user selectable) No cycling for 300 seconds to enter power saving mode Modes - Bicycle odometer has 2 buttons, "Mode" on the right, for finding the desired mode (or parameter), and "Settings" on the left, for confirming the mode. Technology - Predefined tire size, custom KM/M selection, backlight, current speed, maximum speed, travel time, set remember maintenance value, auto start/stop, etc. 19 technical support.   Installation requirements: 1. The distance between the sensor and the host is less than 50cm, the host can receive the signal and work, the closer the better. (The computer sometimes displays fluctuating data, and the distance exceeds 50cm, which does not affect all data) 2. The distance between the magnet and the sensor should be about 5mm, the closer the better. 3. The magnet faces the back of the sensor battery.   Precautions:   For other matters and functions, please read the manual and user manual carefully.