Humidifiers for Bedroom, 3.5L Ultrasonic Cool Mist Humidifier Diffuser, 7-Color Night Lights Switch for Kids, 24dB Ultra Quiet, Microporous Filters, Top-ReFill Evaporator, Up to 35h Run Time About this item NANO ATOMIZATION & HIGH COVERAGE: Equipped with a 2.4MHz ultrasonic atomizer that produces up an ultra-fine mist. Up to 300 ml/h mist output makes its effective range up to 376 ft² / 35 m². TOP FILL HUMIDIFIER: Equipped with the annular water inlet at the top of the unit, no need to open the lid for a refill. To clean a humidifier, remove the lid and wipe the empty tank with a wet cloth. Refilling has never been easier! WHISPER QUIET: The patented silencer allow the humidifier to make only 24dB of sound at a low setting. Meanwhile, the noise level of the high setting is just less than 30dB, which is quieter than a library. 7-COLOR LIGHTS & ESSENTIAL OIL DIFFUSER: The soothing colored lights and fragrant essential oils will bring you the most romantic and comfortable atmosphere. The light can be turned off without worrying about light pollution. MULTIFUNCTIONAL PURIFICATION SYSTEM: This filter not only could soften the water, absorbs impurities and its advanced ultrasonic high-frequency vibration technology releases more delicate water mist, fresh air, and creates a comfortable living environment for you.