What products contain ozone?

Ozone is found in various products, primarily in air purifiers and water treatment systems, where it is used for its strong oxidation properties to remove contaminants. Additionally, some industrial cleaning agents and bleaching products may contain ozone as a component. However, ozone is also a byproduct of certain devices, like photocopiers and laser printers, which can emit ozone during operation. It's important to note that ozone is a gas found naturally in the upper atmosphere, where it protects against UV radiation, but at ground level, it can be harmful to health.