This is a hybrid humidifier with a 400ml water tank, suitable for rooms of 7-11 tatami mats. - Model Name: DH-HB401(W) - Humidification Method: Hybrid - Applicable Floor Area: 7-11 tatami mats - Water Tank Capacity: 400ml - Operation Buttons: Power, Humidification Level, Timer, Temperature Setting, Mute Mode - Features: Ag+, SIAA compliant Thank you for viewing. It's easy to fill with water from the top and comes with an antibacterial cartridge. I've used it a few times, but I'm selling it because I no longer need it due to moving. I've wiped everything down with alcohol, and it's quite clean. All accessories for aromatherapy and the instruction manual are included. It will be packed in its original box and shipped.