The Catit Smartsift is a simple yet innovative automatic litter sifting system that takes the chore out of litter maintenance. It features a noiseless Pull-and-Refresh process that efficiently collects and disposes of waste. Clean litter is recycled back into the pan and waste clumps are deposited in a lined collection bin for easy disposal. Replenishing the litter is also easy, simply open the maintenance access door and add as needed. The Smartsift is suitable for all clumping litter! No more scooping! Simply pull the lever to sift and refresh the cat litter Key Features : -Noiseless Pull and Refresh process to refresh the litter box and collect waste -Clumps fall into the pull-out waste drawer for easy disposal -Large entrance that is suitable for cats of all sizes -Integrated carbon filter for optimal ventilation -Easy access maintenance door to add new litter -Clear-view window to monitor the litter -Includes two liners to keep the litter box and waste drawer clean -Suitable for all clumping litter