The miniature Polaroid camera is the insta-photo before the gram. This cool keychain, that is a replica of the original Polaroid, has a crank motor sound, simulated film, and a clickable red shutter button. Its artsy, chic and retro! There is NO BATTERY REQUIRED! The "film" dispenses but does not develop as it is not a real photo. The viewfinder has a real window. Measures 2 1/4" x 1 3/8" x 1 1/2".