Humidify the air everywhere and anywhere! This Homedics® Portable Ultrasonic Humidifier with optional rechargeable battery let you breathe easier at home or on the go. Continuous or intermittent ultrasonic cool mist delivers soothing humidity to your space — adding just the right amount of moisture to fight dryness. Clean Tank Technology helps protect the tank from mold and mildew in the easy-fill, 7.7-ounce, leak-resistant water tank. Plus, auto shutoff after 10 hours and 7-color accent lights make the unit perfect for nighttime use.