This is a small bicycle clock made from recycled bicycle sprockets & a brand new quartz clock mechanism. This unique bike clock is made with a brand new, non-ticking quartz clock mechanism. It measures close to 12.5cm (4.8'') in diameter. Desk version comes with a custom made aluminum desk stand. Runs on 1AA battery. It will make a great gift for any bicycle lover or someone who already has everything. It also looks great & will make a great conversation starter in your home or work place. & of course, it tells time! :) Check out my clocks too: clocklight.etsy.com All my recycled clocks are made from previously used parts. They are thoroughly cleaned but might show some signs of previous usage. in my opinion this adds to the item's charm. Industrial Clock, Metal Designer Original Desk Unique Modern Gear Cyclist Gift, Gift