LitterMaid LM580 Classic Series Automatic Self-Cleaning Litter Box, Single-Cat (LM580) (LitterMaid Premium Box Kit) Kit includes LM580 classic box, 4 waste receptacles, 4 carbon filters and PVC paw print litter catch mat. Designed for single cat households under 15 pounds Extra high walls to keep waste inside the box and off the floor Removable automatic rake for easy cleaning Motion sensors that activate cleaning cycle, safety bar to stop rake in case of blockage