About this item Unique Ozone Machine: "Air" + "Water" two modes. Maximum ozone output is 28,000 mg/h in "air" mode and 500 mg/h in water mode.Enough to clean 3700 sq.ft of space or 20 L of water Made Well: Upgraded ozone plate and powerful fan to improve working efficiency,Made of exquisite all-metal casing,it is sturdy and lasting,6.3 * 8.2 * 9 inches,weighs 5.7 pounds,with rubber handle and comes with a metal handle for you to carry it around.This is a great ozone machine for home,industrial or commercial use How the Water Mode Work: Tuck in the water stone to the hose end, and another end of hose connect to the mahine interface. Then put the water stone to the water. Set time and turn on the machine, the machine will work. Can be turned on at the same time as Air Mode,but should only be used in unoccupied spaces 2 Hours Timer or "Hold" Mode: The time seeting can up to max 2 hours, please reference the manual to set the time accroding to the space size. Time is up, machine will stop working automatically. Under the "Hold" mode, the ozone machine will work until you turn it off manually Wide Uses : Can be used anywhere you want and need: home,office,kitchen,school,hotel,basement,car and other spaces.And please ventilate for at least 30 minutes after the machine finish the work,then people and pets can be allowed to enter › See more product details