3-State filtration - Fabric pre-filter Activated carbon filter HEPA filter. Wifi Connected with Bissell Connect App checks indoor quality and controls remotely. Automated CirQulate system - indoor air quality readings in real-time and adjusts. Whisper-quiet fan speed option and automated night mode. Convenient easy filter access. Intuitive single-touchpoint control. CADR rated for 308 square feet - for bedrooms living areas basements and more. Supports Bissell Pet Foundation and mission to save homeless pets.