99.9% Germ-Free, 100% Air Sterilization: With innovative micro-electrolysis sterilization technology, MILIN top fill humidifier converts water (H2O) into -OH, [O], H+, OH-, and other highly oxidizing sterilization ions, which can destroy the DNA/RNA of harmful germs in the air. After sterilization, germs are reduced to neutral water molecules which are gentle to your skin and your body. Simply test the air quality level with a bacteria analyzer and enjoy safe and comfortable air. 4L Large Capacity & 8H Timer: With a 4L water tank, MILIN cool mist humidifier provides up to 40 hours of runtime. A 8-hour timer allows you to set a duration that meets your needs. You needn’t to leave your comfortable bed at midnight to refill water, or restart/turn off it! Our humidifier with essential oil diffuser has a large top opening that you can easily pour water in freely without worrying about geting the floor wet. The indicating light reminds you when the water tank needs a refill. Customizable/Standard Sterilization & 3 Mist Levels: In standard sterilization mode, MILIN humidifier for home will perform 30min sterilization in high mist, 30min in medium, and 60min in low. MILIN mist humidifier also has a customizable mode, in which you can freely set a sterilization duration and a mist level. Simply press the mist button and the mist output speed is adjusted during which indicator highlights. Different from others, the dense mist will never get your furniture and floor wet. 3-in-1 Sterilizer, Humidifier & Diffuser: With essential oil diffuser, MILIN cool mist humidifier fills your room with your favorite fragrance along with its cool mist. MILIN LED display humidifier provides 11 constant humidity levels for your selection, from 30%-80%. Long-time stable humidity helps you feel relaxed and happy. MILIN EPA-approved large room humidifier safely and effectively kills 99% of harmful germs in the air. You can freely choose a standard or customized sterilization mode. Auto Shut Off & Whisper Quiet for Sleep: Equipped with ultrasonic technology, MiLin humidifier enjoys incredible silence, lowest noise level 26 dB. The humidifier is perfect for restful sleep as the sleep mode keeps the LED indicators off, with no dazzling light at all. When the tank runs out of water, MiLin humidifier stops working and the low water indicator lights up as a reminder. An additional beep alarm is designed. This helps avoid damage to the item and keeps you safe even when sleeping.