Get a Litter Box that Does the Dirty work for you.With the ScoopFree Complete Plus Self-Cleaning Litter Box, theres no scooping, cleaning or refilling your cats litter box for weeks. It uses crystal litter which provides 5 times better odor control than traditional clumping litter. Stop scooping cat litter, forever, with the automatic litter box trusted by millions.Clean Sweep: The hands-free cleaning cycle runs 20 minutes after your cat leaves her litter box.Do Not Disturb: Safety sensors stop the rake if your cat goes into the box.Out of Sight: Automatic rake sweeps waste into covered trap to lock away smells.