MEGAWISE 3.5L Ultrasonic Cool Mist Humidifier, Top Fill, 40-Hour Runtime

3.5L Tank and 40-Hour Runtime: Provides up to 40 hours of cool mist on the lowest setting, reducing the need for frequent refilling | Wide Top-Fill Opening: Add water directly from the top and access the tank more easily for routine cleaning; keep the water between the minimum and maximum lines | Adjustable Cool Mist: Turn the control knob to set the mist output and rotate the 360-degree nozzle to direct moisture away from walls, furniture and electronics | Quiet Night Light Design: Operates as low as 24dB and offers seven night-light colors that can be selected or turned off for bedrooms, nurseries and home offices | Auto Shutoff and Oil Tray: The unit stops when the water runs low; add essential oil only to the designated aroma tray and never directly into the water tank