Easy to Refill: Humanization design for refilling this air humidifier from top side more conveniently. Maximum is up to 2.5 liter 3 Mist Mode are available from High Medium to Low working time ranges from 8 to 10 hours; Ultrasonic design for cool mist filter free; Kindly Note: The mist will become normal after the ultrasonic humidifier has been working for about 15 minutes. We suggest that you could refill the humidifier with tap water in the middle water level which would be the most mist</br>Easy to Clean: this white tower shaped humidifier adopts Open design of water tank mouth which is convenient for cleaning without dirty corners we suggest you use vinegar to clean it; To better avoid minerals deposits on humidifier boil and then cool down the tap water before you pour it into the humidifier; in addition this could help avoid the minerals from the tap water become white powder when ultrasonic humidifier's working</br>Quiet-Axis Design for Quiet Working for You: Unique Quiet-Axis Design helps stream the waterdrops down without noise when the mist condense into water; Select this filter free humidifier for bedroom is a good choice to give relief to cough and congestion for better breathing and a more comfortable sleep</br>360 Degree Rotatable Mist Nozzles: 2 nozles are available for adjusting the directions you prefer to; Simple and Elegant for home?? bedroom?? study?? living room as well as office etc.. Soft Soothing Night Light (7 colors available): Soft but not dazzling?? sleep with ease; Charming Fragrance: Add essential oil on the top help spray mist with fragrance</br>Technology and Service: iSPECLE ultrasonic cool mist humidifier brings moisture to the dry air?? dry chapped skin / lips?? so you could breathe