Features: This is a bicycle or tricycle general mechanical speedometer, it is a bicycle equipment made of durable aluminum alloy. Pure mechanical bike computer, not only has , but also has accurate data. It works for 26/27.5/28/29 inch bikes only, be sure to check your bike size before you buy it. Our product accessories are complete and easy to install, you can do it by yourself without any effort. The must instrument you should need for your bike journey, and you'll find it useful. Specification: Condition: Material: Aluminum Alloy Color: Black Size: Approx. 11 * 8 * 8 cm / 4.3 * 3.1 * 3.1 in Weight: Approx. 333 g Package List: 1 * Bicycle Computer Note: Only the Bicycle Computer, bike others are just Photography Props. Complete accessory set that is easy to install, allowing for DIY setup without effort Designed for bicycles and tricycles, made from durable aluminum alloy Pure mechanical bike computer that provides accurate data Compatible with 26/275/28/29 inch bikes; please verify your bike size before purchasing A must-have instrument for your bike journey, ensuring you find it useful