Honeywell's Designer Series HUL430C Cool Mist Ultrasonic Humidifier provides cool visible mist comfort to the air in your home to prevent dryness. It features an elegant, sleek, and modern design that fits on your tabletop. It is ideal for medium room up to 300 sq. ft. of coverage. And with ambient lighting and an essential oil tray, for added aromatherapy, you can create a soothing aura while also improving the room's moisture level. The humidifier comes with a refill indicator light, and an illuminated water window with adjustable tank light. The tank capacity is 1.25-gallon (4.73 L), with wide opening making it easy to fill and clean. It can run up to 24 uninterrupted hours per filling. 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