The pure guardian 90-Hour Smart Mist Ultrasonic Humidifier guards against problems caused by dry air in the home， making life pleasant for those with cold， flu， allergies and dry skin. A Smart Mist sensor monitors the humidity level in the room and adjusts accordingly to maintain a consistent humidity level. Silver Clean Protection fights the growth of slimy mold and mildew on the surface of the water tank. Thanks to ultrasonic technology， it is ultra-quiet when it runs making it ideal to have on while you sleep. The humidifier is equipped with the option for warm or cool mist and has a light that turns red to let you know when it's time to refill the water tank. A timer allows you to customize the desired run time for up to 12 hours. It features a soft glow night light that turns on and off and easy-to-use digital controls.

Smart mist technology: a SmartMist sensor monitors the humidity in the room and automatically adjusts output to maintain desired humidity level

Silver Clean protection: treated with Silver Clean technology to fight the growth of slimy mold and mildew on the surface of the water tank a common problem with traditional humidifiers

New extended reach wands: use the extension wands provided to disperse an even mist throughout the entire room

Saves money: with no evaporating pads， filters or wicks to clean or replace， there are no added costs

Warm or cool humidification: enjoy your choice of warm or cool mist

Low water indicator illuminates when it's time to refill the tank