This clock was made using a recycled bicycle chain ring, an imac software restore disk, 2 smaller bike cassette locking gears, a small piece of bike chain and a new quarts drive movement with pendulum. The pendulum does work and is comprised of a piece of bike chain and a small cassette gear. The clock measures approximately 8.5"W x 13"H. It would make a great conversation piece on your wall or great gift for that biker you know who is so hard to shop for. Since these clocks are made from actual recycled bike parts, there will be signs of use and wear. It runs on 2 AA battery (included). Handmade in the USA. Thanks for looking.