【Osoeri Self-Cleaning Automatic Cat Litter Box, APP Control, Integrated Safety Protection, Odor Isolation, Radar Sensing, One-key Sand Cleaning, Removable and Washable, with Mat & Liner】 Easy to Install and Clean: No tools are required to install or disassemble the cat litter box. After power on, wait for the cat litter box to perform a self-inspection, and then pour the cat litter. One-click empty is convenient for litter replacing and drum cleaning. The whole body is washable (except the base). To avoid bacteria growth, please clean the inside every one to three months, to replace the litter box liner every 3 to 5 days.