SmartScoop Basic Green Self-Scooping Cat Litter Box, 25.5" L X 18.25" W X 7.5" H Automatic cat litter box that conveniently scoops waste for you Removes odors with powerful activated carbon filters Eliminates need for daily contact with waste and dirty litter pans Self-cleaning litter box with a powerful yet quiet motor unit Works with your favorite clumping cat litter-- no need to buy special or costly cat litter