Honeywell HUL565BC UltraPlus™ is a filter free, ultra-quiet, ultrasonic humidifier provides cool visible mist! It features touch controls, dual directional mist and 4 humidity settings for your convenience. With 1.5-gallon (5.7 L) tank capacity, it can run up to 40 hours uninterrupted per filling. It has wide opening making it easy to fill and clean. It features refill and humidity reach light, adjustable humidistat and auto shut-off. Essential oil tray for more sensory experience. Many find that a humidifier for the home, bedroom or nursery is an essential part of a good night’s sleep when the air is dry, in allergy season, or when sick