Place the litter box on hard surface like wood or tile floor. Don't place it on carpet or any soft surface. Don't place it in wet areas like bathroom or outside without a roof cover. You need to put litter in the self cleaning litter box first before you start initiating the machine. Only cats that are 3 month older (weighting 1.5-10kg) can use Petree Litter Box.We suggest to use bentonite (clumping clay) cat litter, Tofu cat litter, and mixed bentonite with tofu cat litter. This item is in the category "Pet Supplies\Cats\Litter Trays". The seller is "pika_pet" and is located in this country: AU. This item can be shipped worldwide.