Crane Pink Drop Shape Ultrasonic Cool Mist Humidifier. Increases air moisture for easier breathing and a good night"s sleep. Relieves cough, cold, and flu symptoms including nasal congestion, dry cough, sinus irritation, nose bleeds and dry skin. 0.9 gallon water tank runs whisper quiet up to 24 hours. Effectively humidifies rooms up to 250 square feet. 360 degree mist nozzle and variable control settings. Auto shutoff safety sensor. Does not require filter.