This bike computer can record your riding distance, time and speed. And there are other practical functions such as temperature sensor, stop watch, user A/B interchange, refueling and maintaining reminder. Features: 【Multifunctional】Except for recording riding distance, time, speed, it also can record both user A and B’s riding statistics, perceives temperature, remind you to refuel or service bike, etc. 【Smart Chip】Employed smart chip to record statistics, which prevents losing statistics when speedometer turns off accidentally. 【Clear Display】Large Liquid Crystal Display (LCD) with interchanged day and night backlight clearly shows riding statistics and allows you to easily read them. 【Durable】Quality but lightweight shell covers host closely, protecting display screen from burst. 【Easy Installation】Wireless design is quite convenient for riding and easy to install, you can mount it to your bike without tools. Specifications: Material: Backlight: Green / White(Optional) Item Weight: 32.8g / 1.15oz Item Size: 6.5 * 4.5* 2cm / 2.5 * 1.7 * 0.9in Package Weight: 93g / 3.2oz Package Size: 13 * 9 * 5cm / 5.1 * 3.5 * 1.9in Powered By: 1 * CR2032H Battery Package List: 1 * Speedometer 1 * CR2032H Battery 1 * Wireless Sensor 1 * Mount Seat 1 * Magnet 1 * Silicone Pad 2 * Shockproof Cushion 6 * Nylon cable ties 1 * Instruction