Product Name: Ozone Meter Function: Detect O3/Ozone/Ozono/Ozon/Temperature/Humidity Display Method: 2.8 LCD screen display, 320 x 240 pixels Sampling Time: 1.5 seconds Power Source: Lithium polymer battery with 2000 mAh capacity Detectable Gas: Ozone/Ozono/Ozon (O3) Detection Range: 0.000~5.000ppm Detection Principle: Electrochemistry Response Time: Diffusion 15S Duplicate Value: 2% Resolution: 0.001ppm Insulation Resistance: 20M Alarm Function: Sound (2-3 beeps) Alarm Action Value: 0.3/0.6ppm (alarm on/off switchable) Test Content: O3+AQI+Temperature+Humidity Electrochemical sensor TFT LCD screen display -320*240 pixels Detection data range: O3(0.000-5.000ppm) Suitable for office, indoor, outdoor, and detection of ozone residue after disinfection 24-hour real-time monitoring Power supply: Built-in Li-battery 2000mAh Material: ABS with TFT Screen Color: Black+Orange Size: 1647426MM Product Weight: 500g Additional Features: Electrochemistry sensor for O3 Temperature and Humidity sensor AQI for ozone concentration index Support time and date, self-calibration function O3 Concentration AQI: 0~0.100: Good 0.100~0.300: Slight 0.300~1.000: Moderate 1.000~4.999: Serious Features: 2.8" color liquid crystal display (LCD), 320x240 pixels User adjustable alarm threshold for O3 to alert user of elevated levels Test variables: temperature, humidity Large 2000mAh capacity lithium battery On-board fan to draw in ambient air for more accurate real-time results 5V Micro USB charging Low battery warning Product Includes: 1 x Ozone MeterThanks