No more scooping when you have the LitterMaid LME5500 Self Cleaning Litterbox. After the cat leaves the box, the rack activates to sweep the waste in the the disposable waste receptacle. The LME550 includes 4 waste receptacles and 4 replaceable carbon filters and an ionic air cleaner to eliminate odors. The paw cleaning ramp minimizes litter being tracked outside of the box and the rack is removable for easy cleaning. For convenience the unit includes a sleep timer to prevent the unit"s activation disturbing your sleep.