Product Name: Ozone MeterFunction: Detect O3/Ozone/Ozono/Ozon/Temperature/HumidityDisplay Method: 2.8 LCD screen display, 320 x 240 pixelsSampling Time: 1.5 secondsPower Source: Lithium polymer battery with 2000 mAh capacityDetectable Gas: Ozone/Ozono/Ozon (O3)Detection Range: 0.000~5.000ppmDetection Principle: ElectrochemistryResponse Time: Diffusion 15SDuplicate Value: 2%Resolution: 0.001ppmInsulation Resistance: 20MAlarm Function: Sound (2-3 beeps)Alarm Action Value: 0.3/0.6ppm (alarm on/off switchable)Test Content: O3+AQI+Temperature+HumidityElectrochemical sensorTFT LCD screen display -320*240 pixelsDetection data range: O3(0.000-5.000ppm)Suitable for office, indoor, outdoor, and detection of ozone residue after disinfection24-hour real-time monitoringPower supply: Built-in Li-battery 2000mAhMaterial: ABS with TFT ScreenColor: Black+OrangeSize: 1647426MMProduct Weight: 500gAdditional Features:Electrochemistry sensor for O3Temperature and Humidity sensorAQI for ozone concentration indexSupport time and date, self-calibration functionO3 Concentration AQI:0~0.100: Good0.100~0.300: Slight0.300~1.000: Moderate1.000~4.999: SeriousFeatures:2.8" color liquid crystal display (LCD), 320x240 pixelsUser adjustable alarm threshold for O3 to alert user of elevated levelsTest variables: temperature, humidityLarge 2000mAh capacity lithium batteryOn-board fan to draw in ambient air for more accurate real-time results5V Micro USB chargingLow battery warningProduct Includes: 1 x Ozone Meter