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The Alen BreatheSmart 45i is ideal for bedrooms and other rooms up to 800 sq. ft. Proven to improve sleep by and independent SleepScore Labs study the BreatheSmart 45i emits a soothing pink noise that boosts frequencies in the lower octaves so you wake up feeling rested. Alen air purifiers offer superior performance through the combination of a powerful fan quiet motor and advanced filtration technology to deliver and maximize airflow while minimizing noise. Our medical-grade filters capture particles as small as 0.1 micron removing even the tiniest pollutants including dust pollen pet dander mold spores germs and bacteria and more. Laser sensor technology detects when particles are present and auto-adjusts fan speed so you dont have to. The 5 color coded rings show your indoor air quality at a glance and let you see how Alen is working to clean the air quickly and efficiently. Get real time air quality insights view historical trends or control your purifier remotely using the Alen Air app.