The PetSafe ScoopFree Original Self-Cleaning Cat Litter Box is an automatic litter box that stays fresh and clean without the hassle of scooping. Simply plug in the box and watch it work. The automatic rake system sweeps waste into the covered compartment 20 minutes after your cat uses the litter box. The special crystal cat litter, packed in a convenient disposable litter tray, is 5 times more effective at reducing odor than clay or clumping cat litters. Your cat will always have a clean, fresh-smelling litter box, and you’ll enjoy a home that’s effortlessly odor-free.