Product Description Material: Acrylic+ABS Size: 7.5*7.5*5cm Color: black Quantity: 1 Package Contents: 1*Bicycle Computer 1. Built-in high-sensitivity GPS chip The car's computer has a built-in high-sensitivity GPS chip, which supports three global positioning systems. You only need to set the time zone before use, and the time will be automatically calibrated according to the local time of your country. 2. Multifunctional Small size, light weight, IPX5 waterproof automatic sleep function, convenient and durable. This bike speedometer is great for measuring speed, altitude, distance, riding time, and more. More suitable for cyclists or fitness enthusiasts to record and manage bicycle ride data during training. 3. Adjustable Backlight This advanced cycling computer features day and night backlighting. Just press the back and right buttons at the same time to change the backlight level for easier viewing. Anti-glare LCD lets you easily view data from all angles. 4. Wireless Design and USB Rechargeable Unlike traditional wired bike computers, there are no annoying cables, so this wireless bike speedometer is very easy to install. The USB rechargeable design makes it suitable for any charger with a USB port. Lithium battery provides up to 8 hours of runtime. 5. Bicycle data display The device supports commonly used bicycle data display types: riding time current/average/maximum speed speed comparison current time altitude ODO travel distance and total time.