[Air Quality Monitoring] This air purifier is designed with a built-in PM2.5 sensor and real-time display, eliminating the need for guesswork about air quality. In auto mode, when it detects a decline in air quality, the purifier with the indicator changing to green, blue, yellow or red, and the fan accelerating to purify the air more efficiently [Remarkable Filtration] Featuring an advanced filtration system, the air purifier effectively removes airborne particles. When activated, this air cleaner can refresh the atmosphere in a space up to 1185 sq ft every 60 minutes, clean air delivery rate is 153 FM (CADR), fitting up to 237 ft² room