About this itemSave on the Litter-Robot 4 Core Accessories Bundle, which has all the essentials for getting the most out of your Litter-Robot. This bundle comes complete with Litter-Robot 4, a fence for keeping litter off the floor, step for accessibility, and litter trap mat for litter tracking control. Litter-Robot 4 is a WiFi-enabled, automatic, self-cleaning litter box for cats. Never scoop cat litter again while giving your kitty a clean bed of litter for each use. Features