Bike computer - 16 functions: Sporgo bike computer with LCD green background lighting enables you to read the digitally slightly distant, dark night or in the long tunnel. 16 functions compare speed record, average, maximum, relative, driving time, recording used, stop watch and so on. Wireless Bike Computer - IP54 Waterproof Design: Waterproof design makes it more durable. The outline of the bike computer is simple and cool, whats more with the waterproof design, it will always be fashionable and new. Automatic wake-up call function: Practical and quick to record the speed and kilometers without delay. Just one touch when youre riding again, pick up this bike computer, start your riding time right away. Notes: This wireless bike computer has an automatic power-on function through a built-in scroll switch in the computer so that there is a sound. This is not a product defect, but a normal phenomenon. What you will get: 1 x bike computer; 1 x Wireless Transmitter ; 1 x magnet; 1 x mounting bracket; 4 x cable ties; 1 x elastic band; 1 x instruction. If you have problems with our bike computer, you can contact our customer service directly. They will solve your problem perfectly. Product A bike computer is very important for a rider: Firstly, it shows the real-time speed of the bike so that the rider can effectively control the physical force. Second, it shows the time and total number of riding miles, which gives the rider the basis to set a complete riding plan and rest plans at any time Waterproof protection: Brief immersion in water, light rain or moderate rain with no problem, however, staying in the rain for long periods is not recommended to avoid water failure. Turn the coin to the left to open the battery cover, replace the battery with a new one (the positive side is up), cover the battery case and turn to the right to tighten it Function: SPD CURRENT SPEED ODO ODOMETER (0.001 -99999km / m) DST TRIP DISTANCE MXS MAXIMUM SPEED AVS AVERAGE SPEED TMELAPSED TIME. CLK CLOCK (12H / 24H) SCAN COMPARATOR SETTING SPEED SCALE (km / h ^ n / h) SETTING TIRE CIRCUMFERENCE: (0mm - 9999mm) SETTING THE LAST VALUE OF ODOMETER / ODO -FREEZE FRAME MEMORY AUTO ON / OFF SIGNAL INTERFERENCE-RESISTANCE -BACKLIGHT Package includes 1 x bike computer 1 x Wireless Transmitter 1 x magnet 1 x mounting bracket 4 x cable ties 1 x elastic band 1 x instruction