5.5L TOP FILL TRANSPARENT TANK: You always know how much water left in the humidifiers, and the large opening detachable tank allow you to clean or refill the tank easily. 5.5L/1.45Gal Extra-large water tank suitable for rooms up to 40m²/430ft², running up to 20 hours( high mist), 40 hours(low mist). And it has timer function, you can set it on 1H/4H/8H as you like. 4 LAYERS FILTER: This cool mist humidifier include a 4-layers filter tray which is detachable and washable, specially added 2 layers of silver ion filter core. So there is no excessive requirement on water quality and no need to replace the filter core every 3 months. Can provide you with fresh and safe water, smell the fresh air like you are in a forest. SMART HUMIDIFICATION: This baby humidifier has 360° nozzle and 3 mist speed settings. It can detect the humidity in your room and auto adjusts to your preset humidity level for optimal indoor humidity with the built-in humidity sensor and Constant Humidity Mode.You can set your favorite humidity level (40%~80%), it will stop working on automatically when reached or dropped the desired humidity. Best comfortable humidity: 40%~60% (human),50%~60%(baby). LEAK PROOF DESIGN: The bottom of the water tank uses double-layer airtight silica gel to ensure no leakage.and the clear LED display makes you know the real-time humidity level and settings at a glance, you also can choose sleep mode to shut off LED screen.And this room humidifier has a essential oil tray whic allow you add some essentail oils.Ultrasonic technology produces less than 28 dB of noise ensures the extremely quiet. Came with a remote for easy control from your bed. DOUBLE PROTECTION: The air humidifier automatically shuts off when you lift up the water tank or when it runs out of water. Our humidifiers including dual water shortage sensors, magnetic ring induction and atomizer induction.Free your worry about dry running when you are sleeping. Note: if any problem with this room humidfier, please contact us for replacement before return!