Bicycle Mechanical Code Table Mountain Bike Code Table Cycle Odometer Stopwatch Wired Speedometer Bike Accessories This is a retro round watch, beautiful and small, you can alway through it to know your Cycle status. Feature: This is a bicycle general mechanical speedometer, it is a fine-quality bicycle equipment made of practical material. Pure mechanical bike computer, not only has fine quality, 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 fine instrument you should need for your bike journey, and you'll find it useful. Specifications: Color: black Material: aluminium alloy Waterproof: yes Package size: 95 * 93 * 80mm / 3.7 * 3.7 * 3.1in Package weight: 340g / 12.0ounce Packing List: 1 * Stopwatch