With the ScoopFree Self-Cleaning Litter Box, there's no scooping, cleaning or refilling your cat's litter box for weeks. It uses crystal litter which provides 5x better odor control than traditional clumping litter. Safety sensors ensure that the scooping cycle only occurs when your cat is out of the box. It uses disposable trays with a plastic lining to help protect against leaking, and a lid for quick & easy disposal. Just remove the tray & throw it away. A health counter tracks how many times your furry feline uses the box, which is a convenient way to detect early signs of a health issue.