This clock was created using a recycled Apple, MAC G4 computer motherboard and comes complete with a mouse utilized as the working pendulum bob. The clock face is a Computer Lightscribe DVD with numbers etched into the disk. This clock has a quartz clock/pendulum movement and runs on 2 AA batteries, included. This clock measures 10″ W x 17″ H. Since these clocks are made from recycled computers, there will be signs of use and age. All parts are thoroughly cleaned. It will make a great conversation piece on your wall or a great gift for that computer geek you know who is so hard to shop for. Thanks for looking.