Automatic control of the desired humidity level. Ionizer, to remove bacteria in the air and ensure clean steam. Auto-off in case of water shortage. 12 hour timer Ceramic filter for water. Quiet: <35 dB. Low power consumption: 30W. 4.5L tank. Approximate duration: 15 hours. Safety switch that stops operation when the tank is poorly positioned., Weight: 4.40924524 pounds, Manufacturer: Poly Pool