OZONE OUTPUT- This Ozone Generator Ionizer has max ozone output per hour of 22000 mg, meeting the 4000 square feet+ of space. And it has a built-in the latest upgraded ceramic ozone plate, which is sturdy and durable and has a long use life, easy to clean. EASY TO USE- You just need to turn the timer to work. the timer can be set for up to 180 minutes, and the "HOLD" setting can also be used continuously. We suggest that to set a time before you leave the room and ensure that no people (or pets) is in the room when it is working. It can start from 10 minutes and increase the setup time if necessary, depending on the size of the space. HIGH-QUALITY- Our Ozone generators adopt a horizontal output design that ozone does not directly face your face when opened the generator. And the ozone generators adopt an exquisite all-metal shell, sturdy and durable, weighs only 5.8 pounds, and is equipped with a metal handle, which is convenient for you to carry with