LitterMaid LM900 Mega Self-Cleaning Litter Box Automatically rakes waste into sealable container 10 minutes after use Large capacity: ideal for large- and multiple-cat households Plugs into wall socket or operates with eight D-cell batteries (not included) Paw cleaning ramp and 12 reusable/disposable waster containers included 29 inches long, 8-7/8 inches high, 16-3/4 inches wide