Operates up to 24 hours per filling. Air-Cleaning filter removes dust pollen odors and smoke from the air before it is moisturized. Quiet Operation. Can be filled with a pitcher. Has an On/Off switch. 1.5 gallon water bowl. Best for Mediuim Rooms.MODEL- V400 VENDOR- HONEYWELL FEATURES- Vicks 1.5 Cool Mist Humidifier Operates up to 24 hours per filling Air-Cleaning filter removes dust pollen odors and smoke from the air before it is moisturized. Quiet Operation Can be filled with a pitcher Has an On/Off switch 1.5 gallon water bowl Best for Mediuim Rooms