Description: Waterproof Design: This bike speedometer has a waterproof design that allows you to use it even on rainy days. Full Screen Backlight: This speedometer comes with a full screen backlight, which is very convenient for you to use. The digital cycling computer is designed with a clear LCD screen and the backlit function let you can easily see the screen even in the dark. Product Features: This speedometer number is accurate and the performance is stable. Lightweight and Compact: This product is lightweight which you can carry it around without burden. Simple and fast installation, easy to install and replace. Memory Function: This speedometer comes with a memory function, and data will not be lost even after a power failure. This digital bike computer is a good partner for your cycling. It can display much information, such as speeds, distance, time and so on. Specification: Color: Black. Material: Plastic. Size: Approx. 8.1x7.0x6.7cm/3.2x2.8x2.6inch. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Bike Speedometer (with 1 Piece Extender and 1 Piece Wireless Sensor and 1 Piece Tie and 2 Pieces Gasket and 1 Piece Induction for Magnet and 2 Pieces Batteries).