Catit Smart Sift is an innovative litter tray that takes care of the regular removal of dirty cat litter. Simple & quick. Just pull the lever to change the litter - it's that simple. Catit Smart Sift quietly collects and removes the cat's litter. The litter tray is so easy to use that even children can handle it. Litter separation. During the internal cleaning process, the solid components are separated from the clean cat litter. The clean litter falls through the sieve and then back into the litter tray. The lumps of litter remain in the litter tray. 1x weekly waste disposal. No more shovelling necessary. It is a safe and manually operated system with no motorised or flammable parts. Transparent access window for a clear view of the litter. The swinging door is suitable for cats of all sizes, allows the cat easy access and can be easily removed. More info: Simple & quick: Pull the lever once a day and replace the pull-out litter bag once a week Integrated activated carbon filter for odour control Large entrance with swinging door (easily removable) Closed design - no mess, odours or dust.Sifting through cat litter is no longer necessary Cat litter is used much more efficiently Pull-out bin liner Suitable for all types of clumping litter Maintenance access / Cat friendly as motorless drive.