Filter-free ultrasonic. Helps improve moisture for coughs, sinus irritation & other effects caused by dry air. 360 degrees mist nozzle. Vapor pad tray. Half gallon tank. 15 hour run time. Whisper quiet. Use with optional HS-1950 vapor pad (sample pad included). Happy, healthy humidity. Three output settings are perfect for any space. 360 degrees mist nozzle directs humidity. Half gallon tank runs up to 15 hours, easy to clean. Clean control. Anti-microbial function proven to help reduce bacteria growth in the humidifier base*. No Filter Required: Optional demineralization filter available. Whisper Quiet: Mist runs whisper quiet for a good night's sleep. Tank Capacity: Half gallon runs up to 15 hours, perfect for medium sized rooms. Room Size: Ideal output for medium sized rooms. Control lights dim after 20 seconds. * Antimicrobial properties are built in to inhibit the growth of bacteria to protect this product. The antimicrobial properties do not protect users or others against bacteria, viruses, germs, or other disease organisms. Always clean and wash this product thoroughly before and after each use. cETL us Certified AC Adapter. www.crane-usa.com. Made in China.