? 4L Large Capacity: 1.06 gal/4L humidifier allows for up to 50 hours of continuous use at low setting on a full tank. The cool mist humidifier helps you to breathe easier wherever you are, from the bedroom to the living room to the office. A perfect remedy for the driest autumn and winter days. ? Top-fill Humidifier & Oil Diffuser: Top-filling design makes for easy refilling and cleaning. Made from premium material, Humidifier allows you to add essential oils to the water tank for aromatic benefits. Infuse the air with your favorite fragrances. ? Sound & Silent Sleep: Operates at 24dB, you will sleep soundly with this air humidifier. The sleep mode keeps LED lights and indicator lights off, runs at low mist, bringing you a full night’s undisturbed sleep. ? Adjustable Mist to Meet Different Needs: Touch the buttons to choose high or low mist as you like. Recommend to select high mist in living room, bedroom, office; low mist for baby room, study room, etc. ? Safe & Reliable: Cool mist humidifier will auto shut off at a low water level to prevent dry run. BPA-free material makes it healthy for baby, kids