Clear, easy-to-read display: 2.8 inch colour LCD, 320 x 240 pixels shows real-time O3 readings so you can quickly assess air quality at a glance. Accurate ambient sampling: an integrated fan draws ambient air into the sensor for faster, more consistent and representative ozone measurements. Custom alerts: user-adjustable O3 alarm threshold lets you set the concentration level that triggers an alert, reminding you when ozone levels rise. Portable power and convenience: 2000mAh high-capacity lithium battery with USB charging supports extended use and includes a low battery warning so you won’t be caught off guard. Versatile application: designed to detect ozone residues across a wide range of environments — offices, indoor living and working spaces, outdoor areas and locations following ozone-based disinfection. Straightforward operation: compact, self-contained unit provides continuous, real-time monitoring without complex setup or additional equipment. Practical use scenarios After disinfection: verify that ozone concentrations have returned to acceptable levels following room or equipment ozone disinfection procedures. Office and shared spaces: monitor meeting rooms, lobbies and work areas to ensure ozone is not at elevated levels that could affect occupants. Indoor/outdoor checks: perform spot checks at indoor air intakes, building entrances or outdoor areas where ozone exposure is a concern. Key performance and compatibility notes Display: 2.8 inch colour LCD, 320 x 240 pixels. Alert: user-adjustable O3 alarm threshold to notify of increased concentrations. Sampling: built-in fan for active air intake and real-time readings. Power: 2000mAh high-capacity lithium battery, USB charging, with low battery warning. This device provides clear, real-time ozone monitoring with active sampling, adjustable alarms and reliable battery power—helping you quickly identify and respond to elevated ozone levels in a variety of environments.