•Portable humidifier •Ultrasonic cool mist •Continuous and intermittent settings •7.7-ounce, easy-fill water tank •Clean Tank Technology •7-color changing nightlight •Auto shutoff after 10 hours •Includes 3 wicks 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. Dimensions (Overall): 6.89 Inches (H) x 2.52 Inches (W) x 2.52 Inches (D) Weight: .46 Pounds Misting Type: Cool Mist Capacity (Volume): 7.7 Ounces Moisture Output: 8.5 Ounces Number of Settings: 2 Filter Type: Wick Industry or Government Certifications: No Certifications Room Size Range: 100-300 sq. ft. Run Time per Fill: 10 Hours Volts Required: 120 Volts Power Source: USB, Battery Battery: 1 Non-Universal Lithium Ion, Optional, Included