Features Adjustable O3 Alarm: Features a user-configurable ozone alarm threshold. An audible alarm will alert users if ozone levels surpass the pre-set limit, ensuring prompt awareness of potentially hazardous concentrations. USB Rechargeable: This device includes a USB charging port for convenient power-ups, alongside a high-capacity 2000mAh lithium battery equipped with a low-battery warning system for uninterrupted operation. High-Clarity Display: Boasts a color LCD with high-definition pixels for clear visibility. The screen also displays time and date, and the device features a self-calibration function for maintained accuracy. Precise Measurement: The ozone detector is fitted with advanced electrochemical sensors, as well as temperature and humidity sensors. It also incorporates an internal fan that draws in ambient air, enabling more accurate and real-time readings. Compact and Mobile: Designed for on-the-go monitoring, this small and lightweight ozone detector ensures portability. It easily fits into a pocket or bag, allowing you to assess air quality wherever you go. Features: User adjustable O3 alarm threshold for elevated concentrations USB charging port with 2000mAh lithium battery Clear color LCD screen with time and date display Built-in sensors for accurate real-time results Compact and portable design for easy monitoring Specifications: The Ozone Meter Detector is user adjustable and features an O3 alarm threshold that sounds when elevated concentrations are detected. It is equipped with a USB charging port and a high capacity 2000mAh lithium battery for convenience. The detector has a clear color LCD screen with time and date display, as well as a self calibration function. It uses built-in electrochemical sensors, temperature and humidity sensors, and a fan to draw in surrounding air for accurate readings. The compact and portable design allows for easy monitoring of ozone concentration in the air at any time. Package Included: 1 x Ozone Meter Detector 1 x USB Cable 1 x Instruction Package List 1 x O3 Meter Detector 1 x USB Cable 1 x Instruction