TRUE HEPA FILTER: The Crane air purifier for office removes up to 99.95% of airborne particles including dust, pollen, smoke, and pet dander, helping to create cleaner air anywhere you need it COVERS UP TO 300 SQ FT: Our home air purifiers are a perfect addition as a bedroom air purifier or air purifier for baby room, while also being a valuable dorm room essentials item TIMER FUNCTION: The Crane air purifier with HEPA filter has a 2, 4, or 8 hour timer function before automatically shutting off, making it a great air purifier for bedroom, while being whisper quiet IDEAL BABY AIR PURIFIER: Featuring a child lock feature and auto shut-off feature, this mid size room air filter is a great option for the baby nursery, or as an air purifier for baby registry WHISPER-QUIET SLEEP MODE: Ultra-low noise operation makes this air purifier ideal for bedrooms and nurseries at night — choose from 3 fan speeds or switch to sleep mode for undisturbed rest