PureGuardian H4810AR Ultrasonic Warm and Cool Mist Humidifier for Bedrooms, Quiet, Filter-Free, 120 Hr, 2 Gal Treated Tank Surface Resists Mold, Pure Guardian Humidifier with Essential Oil Tray Humidifier Humidifier Humidifier About this item WARM & COOL MIST HUMIDIFIER: The Pure guardian H4810AR ultrasonic cool mist humidifier guards against dry air in the home, perfect for those with colds, allergies and dry skin; The easy fill 2 gallon tank is ideal 600 square feet rooms and runs up to 120 hours LOW WATER INDICATOR & AUTO SHUT-OFF: When the unit is low on water the Refill LED on the front panel will light up, and the unit will shut off. Simply add more water to continue use. Unit will automatically resume running when water tank has been refilled AROMATHERAPY TRAY: The aromatherapy tray option helps create a relaxing environment with your favorite essential oil; Oils are not included; Create a better home environment and optimize your comfort with an ultra-quiet, soothi...