⚪️ Equipped with a green tea catechin filter, which suppresses viruses, airborne bacteria, and mold. ⚪️ Features a dirt sensor that detects odors like cigarette smoke and automatically adjusts operation. ⚪️ The dust collection filter and deodorizing filter are recommended to be replaced approximately every 2 years. Operation confirmed! Stored at home. Please refrain from purchasing if you are overly concerned about condition. Free shipping