OZONE DETECTOR: User adjustable O3 alarm threshold, which will sound when the threshold is reached to alert the user of elevated concentrations.SMALL AND PORTABLE: The small size and light weight of the ozone detector makes it very convenient to carry around so that you can monitor the ozone concentration in the air at any time.CLEAR SCREEN: Ozone detector adopts color LCD, high definition pixels, easy to view, support time and date, self calibration function. Specification:Item Type: Ozone Meter DetectorMaterial: ABSColor: WhiteO3 Sensor Technology: ElectrochemicalTemperature and Humidity Technology: Temperature and humidity sensorsO3 Detection Range: 0-50ppm (Accuracy 0.01ppm)Battery: 1 x 2000mAh rechargeable lithium battery (shipped with built in battery)Display: 3.5in LCD displayAtmospheric Pressure: 86Kpa-106KpaSampling Time: 1.5secDetection Temperature: -10℃-50℃ (accuracy ±1℃)Humidity: 20%-85% Relative Humidity (accuracy ±4% Relative Humidity)Storage Temperature: -10? to 60?How to Use:Take out the product, install it and use itPackageList:1 x Ozone Meter Detector1 x USB Cable1 x Instruction