ULTRASONIC TECHNOLOGY: The Homedics Ultrasonic Humidifiers for large rooms have high-frequency technology that converts water into a fine, evenly dispersed mist; ideal as a bedroom humidifier and for family rooms up to 426 sq. ft. TOP-FILL HUMIDIFIER: The easy to fill tank holds 1.47-gallons of water and provides up to 70 hours of cool mist runtime per fill QUIET & CONVENIENT: - Perfect for nighttime use with whisper-quiet operation and built-in night-light; add your favorite scent to the cool mist humidifiers with 3 included essential oil pads; includes 1 demineralization cartridge CUSTOMIZED SETTINGS: Choose from 3 cool mist settings on the personal room humidifier; built-in auto-off timer includes 3 timed options; programmable Digital Humidstat helps maintain desired room humidity 70 HOUR RUN TIME: Allow the HoMedics TotalComfort Deluxe Ultrasonic Humidifier to run for a full 70 hours, with auto shut-off when out of water, and auto off timer up to 12 hours 360° MIST NOZZLE: Programmable humidistat 35-55 RH from all angles, with 3 mist settings for all needs DIGITAL DISPLAY: Easy to use, simple digital display and night light with on/off feature CLEAN TANK TECHNOLOGY: Clean Tank Technology helps protect the tank from mould and mildew, Clean transducer/ultrasonic membrane indicator built in INCLUDES: 1 demineralization cartridge, Essential oil tray with 3 pads. Perfect for a coverage area: 426 ft2/39.5 m2