It is compact by design, but is equipped with cutting edge features to keep your indoor air clean. Equipped with a HEPA efficiency rating of 99.97%, it uses a four-stage filtration system to effectively eliminate odors and pollutants. The mighty includes an air quality indicator through our particle sensing technology that will kick your air purifier into high gear when needed, and when pollution is not detected for 30 minutes, the fan will automatically stop to save energy. The fan automatically adjusts the airflow when pollutants are detected in the air, providing peace of mind that indoor air quality is always being monitored. The intuitive Air Quality Indicator uses particle sensor technology to monitor the indoor air quality, and responds with a vivid color change to show the air condition. When it’s time to change the filter, the Coway Filter Change Indicator will light up; ensuring clean air is always circulating. Color: White. Gender: Unisex.