The Petsafe Scoopfree Ultra self cleaning litter box features an automatic rake to clean the entire box a set time after your cat uses it. With safety sensors which reset the timer if your cat enters the box before it has been cleaned, any waste is raked into a closed compartment for exceptional odour control.The self contained crystal litter is ultra absorbent and 5 x better at controlling unwanted smells than regular litter, and the disposable trays feature a leak proof lining for fuss free cleanup. The privacy hood allows your cat to feel safe and secluded and also reduces litter tracking, whilst a health counter tracks how many times your cat uses the box.Key Benefits Self-cleaning automatic rake cleans entire box 5, 10 or 20 minutes after cat uses it Rakes waste into closed waste compartment for superior odour control Safety sensors automatically reset rake timer if cat re-enters box Disposable litter trays with leak-proof lining for easy cleanup Crystal litter absorbs urine for 5x better odour control than other litter Uses 5-10x less litter than clay and clumping litter Privacy hood gives your cat a secluded bathroom and reduces litter tracking Health counter tracks how many times your cat uses the box Lab tested for 100,000+ cycles without failure or jammingMore InformationFor best results, replace the litter tray every 20 - 30 days for one cat, every 10 - 15 days for 2 cats, or every 7 - 10 days for 3 cats. You might need to replace the litter tray more often if you have senior cats, kittens, or cats who eat a diet high in crude fibre, ash, and by-products.ScoopFree litter trays can be used by themselves as portable, disposable litter boxes. Scoop the waste under the waste compartment or replace the tray when needed. Mix the litter daily to reduce odours. Most cats adapt quickly to using the ScoopFree litter box.DimensionsLitter Area Dimensions: 35.5 cm x 35.5 cmExterior Dimensions: L 70.18 cm x W 48.56 cm x H 40.64 cm