SPECIAL AROMA BOX – Adding essential oils directly to the water tank could lead to the erosion of the water tank. Unlike conventional humidifiers, ALACRIS Humidifers have a special built-in anti-corrosive aroma box to allow safe use of essential oils, diffusing the essential oils into the air along with water mist to leave your room smelling fresh. TIMING SETTING – If you don’t want it to run all night, the humidifier supports setting a timer to turn off after 1 2 4 8 hours. Note: You can press the TIMING button for 3 seconds to enter sleep mode. When in sleep mode the humidifier turns off the display screen and runs quietly. QUITE OPERATIOIN – The Ultrasonic Humidifier only produces less than 30 dB ultra-quiet sound when in operation, so you can place it in the bedroom or even bedside to enjoy a restful sleep. 4L LARGE TANK – This large humidifier is designed with a 4L capacity water tank, which can serve the entire house for up to 30 Hours after a single refill. The convenient top-fill design allows you to easily clean and refill the humidifier whenever you need. Besides, the humidifier has 3 levels adjustable mist volume to suit your needs, enjoy comfortable space!. SIMPLE SMART CONTROL – The humidifier has a clear LED digital display showing the current humidity level and mist volume visually. With straightforward and well-designed buttons, you can control the humidifier easily — On Off, Mist Volume, Humidity, Timer. Also, you can remotely control the humidifier with the included remote control. CUSTOMIZED HUMIDITY – Equipped with a high-precision humidity sensor, the Smart Humidifier accurately monitors and regulates the humidity level of the air in the room, and maintains a constant humidity level according to a user-set target humidity value (between 45 and 90 RH). Keeps your room at an ideal humidity level!. EFFECTIVE HUMIDIFYING – With the design of 360 Rotatable dual-spray nozzle and advanced humidification systems, the Air Humidifier emits fine mist into the air and fills your room, quickly increase air humidity and effectively relieving discomfort caused by dry air.