From the H Collection. Objecto's original and classic humidifier is small in appearance but huge in performance, blending with every room's décor. Features include aroma tabs for added essential oils, ultrasonic technology to kill bacteria and a timer mode which lasts up to 18 hours. Fill tank with filtered water. Lasts 18 hours Humidifies 350 sq. ft. Automatic shut off Polycarbonate Hand wash Imported SPECIFICATIONS Tank capacity, 2.1 qts. Diameter, about 8" Height, about 12".