Mist-free evaporative humidification for spaces up to 645 square feet including adjoining spaces that cannot be closed off such as hallways. lofts. and stairways. Based on standard 8-foot ceilings. WiFi compatibility with the Smart Life app allows device control even while away. Requires a 2.4 GHz or a combined 2.4/5 GHz network. Not compatible with 5-GHz networks. Healthy air humidified to an optimal 40-60%. As a disk stack rotates in the water reservoir. clean water evaporates to humidify the air in your space. Allow the humidifier to run continuously for the first 7-10 days on the highest speed. Safe for use with tap water. Naturally reduces harmful pollutants in the air at a humidity level of 40-60% The interactive touch display features an auto mode which allows you to preset a target relative humidity level. as well as a sleep mode which dims the screen and reduces the fan speed. -