It comes to litter boxes why not go with the best? The LitterMaid Elite Mega Self Cleaning Cat Litter Box is a programmable litter box and can be used in multiple cat homes. Automatically cleaning your cat's litter box everyday with a removable rake the LitterMaid Elite Mega Self Cleaning Cat Litter Box also comes with ionic air cleaner waste receptacles and carbon filters to help keep odor waste trapped. Powered through outlet or D batteries this innovation litter box for cats has a paw cleaning ramp to keep litter and waste from getting on the floor. No other litter box is like the LitterMaid Elite Mega Self Cleaning Cat Litter Box which is motion sensored to stop and start cleaning cycle and includes a safety bar so your cat will always use it safely.