Smart Fresh Air Deodorizing Closed Cat Litter BoxFeatures Ventilation to remove odor: Exhaust all harmful gases such as odor, dust, moisture, etc. to the outdoors for true health and complete deodorization Smart sensing mode: 10 seconds after it senses that the cat has entered and left, it will start deodorizing for 12 minutes; if it enters again midway, it will stop working immediately and reset the timer for 12 minutes after leaving. Thoughtful design: It has a child lock function to prevent cats