Feature:1. OZONE DETECTOR: User adjustable O3 alarm threshold, which will sound when the threshold is reached to alert the user of elevated concentrations.2. USB CHARGING: The ozone detector is equipped with a USB charging port and a high capacity 2000mAh lithium battery that warns when the battery is running low.3. CLEAR SCREEN: Ozone detector adopts color LCD, high definition pixels, easy to view, support time and date, self calibration function.4. ACCURATE READINGS: Built in electrochemical sensors, temperature and humidity sensors, and an on board fan that draws in surrounding air for more accurate real time results.5. 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.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 18650 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% RH (accuracy 4% RH)Storage Temperature: -10 to 60.Package List:1 x Ozone Meter Detector1 x USB Cable1 x InstructionNote: