Roll n Clean Self Cleaning Litter Box JUST ROLL WITH IT - Omega Paw's Self-Cleaning Litter Box is just what you are looking for! The Roll'n Clean litter box doesn't use electricity, never breaks down; it just keeps rolling and rolling. Save yourself the headaches and money by buying this amazing self-cleaning litter box. HOW IT WORKS - Just roll the litter box onto its top, and roll back to the up-right position. Inside, a unique patented screen separates the clean litter from the clumped waste  putting all the waste into the scoop. Remove the tray and dispose of the waste! Cleaning after your fluffy friend has never been easier! GREAT FOR BIG CATS OR MULTIPLE-CAT HOUSEHOLDS - This large Self-Cleaning Litter Box quickly self-cleans, while controlling dust and containing odors. Omega Paws Self-Cleaning Litter Box allows you to clean your cats waste in just seconds, without scooping! USE LESS LITTER - This large Self-Cleaning Litter Box requires less litter than a traditional litter box and the scoop only collects clumped waste - clean litter is never thrown away. PLEASE NOTE - Litter pan works only with clumping and silica litter.