TaoTronics Ultrasonic Humidifiers, 3.5L Cool Mist Humidifier for Home Baby Bedroom with Filter, Two 360&deg;Rotatable Mist Outlets, Classic Dial Knob Control -(3.5L/0.92 Gallon, US 110V) Quiet and Healthy - TaoTronics ultrasonic humidifier silently infuses your room with clean moisturized air, produces only 38dB for library-level noise. Double 360 Rotatable Mist Outlets - Output mist in two directions simultaneously, maximum output of 330 ml/h (0.08 gal/h) quickly fills a room of 10-30 m / 107-322ft. Large 3.5L Water Tank - You can get up to 10 hours of continuous mist without refilling, ideal for bedroom and office use. Straightforward Dial Knob Control - switch to turn ON and OFF, conveniently adjust the amount of mist flow. Smart Low-water Protection - the humidifier shuts off automatically when detects low water with a warning red LED indicator. Built-in Ceramic Filter - filters out water impurity, harmful bacteria and bad odor at molecular level, leaving you with a clean and pure water vapor. Note: Please do NOT use with essential oils.