Product Material: Acrylic + ABS Size: 7.5*7.5*5cm Color: white, red, black Quantity: 1 pcs Package content: 1 pcs * Bicycle code table 1. Built-in high-sensitivity GPS chip This bike computer has built-in high-sensitivity GPS chip, and it supports three global positioning systems, just need to set the time zone before use, the time will be automatically calibrated according to the local time of your country. 2. Multi-functions Small size, light weight, IPX5 waterproof, automatic sleep function makes it convenient and durable. This bicycle speedometer is very suitable for measuring speed, altitude, distance, riding time, etc. It is more suitable for cyclists or fitness enthusiasts to record and manage bicycle riding data during training. 3. Adjustable backlighting This advanced cycling computer is designed with day and night backlighting. just press the back and right buttons at the same time to change the backlight level for easy viewing. anti-glare LCD lets you easily see the data from all angles. 4. Wireless Design 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 adaptable to any charger with a USB port. lithium battery offers up to 8 hours of running time. 5. BICYCLE DATA DISPLAY The device supports types of frequently used bicycle data display: riding time, current / average / maximum speed, speed comparison, current time, altitude, ODO, driving distance and total time. NOTE: Please make sure your M3 is connected to the GPS before cycling.