Clear Display: High resolution, backlit display is easy to read even in direct sunlight or in the dark. With the touch of a button, you can scroll through the different functions. High-precision data: Improved new programs and optimized chip materials allow you to get reliable data on speed, distance, time and more on every ride. Automatic function: If you do not press any button in the power-on state and drive forward 5 meters, the bicycle computer will automatically wake up wirelessly and remember the previous value. Low battery reminder: When the voltage of the sensor or bicycle computer is lower than 2.5V, a low battery reminder symbol will appear to avoid sudden stop working. Just replace the battery in time to resume operation. Comes with Battery and Installation Instructions: This bicycle speedometer includes detailed installation instructions (English), CR2032 battery and other accessories for easy installation. Note: This bicycle computer is not suitable for electric bicycles. Color: As shown Material: ABS Size: 5.6 x 4.1 x 2 cm Package Contents: 1 x Cycling Computer 1 x Wireless sensor 1 x Mount 4 x Plastic tie-wrap 1 x Elastic band 1 x CR2032 battery 1 x 23A battery 1 x Magnet 1 x English User manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.