The Simply Clean™ Litter Box System has no visibly exposed moving parts. The litter bowl rotates slowly at a rate of one rotation per hour. So, the system is quiet, safe and convenient for you, your family and your pet. The Simply Clean™ Litter Box System reduces odor-causing bacteria by continuously removing waste from the litter bowl and moves it up the conveyor system. The waste is then discarded into a built-in receptacle automatically, 24 hours a day. So, your cats litter box is always fresh and ready for use. Features: Continuously cleans without disturbing your cat Economical and environmentally safe, uses recycled plastic shopping bags Quiet and simple to use Easy to clean, reduces odor and odor-causing bacteria No tools - some assembly required Safe - no visibly exposed moving parts No batteries required - uses low-voltage AC adapter Just plug into a standard wall outlet and the unit is ready for use