SPT SU-4010 Ultrasonic Dual-Mist Warm/Cool Humidifier with Ion Exchange Filter - Blue Dual function: Warm and Cool mist ION exchange filter Ultrasonic generator Humidity output: 400cc/hour Designed for rooms up to 500 sq. ft Dual function: Warm and Cool mist, ION exchange filter Ultrasonic generator, Humidity output: 400cc/hour Designed for rooms up to 500 sq. ft., Split nozzles: 360 adjustable direction 4.0L water tank capacity, Overheat protection Super quiet operation, Energy efficient, Cleaning brush included, ETL, 1-year limited warranty