This clock was created from a recycled bike wheel and repainted. The wheel mounts to the wall with a custom hanger. The clock movement is a high torque quartz movement and is attached to a set of rear cassette gears to conceal the movement. The clock runs on 1 AA battery. This wheel measures roughly 24 inches in diameter. Since these clocks are made from actual repurposed bike wheels there will be imperfections such as scuffing, scratches, warping, corrosion, etc. This is a great looking wheel, with a cool, clean spoke pattern. Handmade in the USA. It will make a great conversation piece on your wall or a special gift for that bike nut you know who is so hard to shop for. Thanks for looking.