This is a retro round watch, beautiful and small, you can alway through it to know your cycling status.<br/>Feature:<br />This is a bicycle general mechanical speedometer, it is a fine-quality bicycle equipment made of practical material.<br />Pure mechanical bike computer, not only has fine quality, but also has accurate data. <br />It works for 26/27.5/28/29 inch bikes only, be sure to check your bike size before you buy it.<br />Our product accessories are complete and easy to install, you can do it by yourself without any effort.<br />The fine instrument you should need for your bike journey, and you&#39;ll find it useful.<br/>Specifications:<br />Color: black<br />Material: aluminium alloy<br />Waterproof: yes<br />Package size: 95 * 93 * 80mm / 3.7 * 3.7 * 3.1in<br />Package weight: 340g / 12.0ounce<br/>Packing List:<br />1 * Stopwatch