Product Name: Ozone Meter Function: Detects O3/Ozone/Ozono/Ozon, Temperature, and Humidity Features a 2.8" LCD screen display with 320 x 240 pixels Sampling time: 1.5 seconds Power source: Lithium polymer battery with 2000 mAh capacity Detection range for Ozone/Ozono/Ozon (O3): 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 beep) Alarm action value: 0.3/0.6ppm (alarm on/off switchable) Test content: O3+AQI+Temperature+Humidity Electrochemical sensor TFT LCD screen display with 320*240 pixels Can be used in office, indoor/outdoor, and for detection of ozone residue after disinfection 24 hours real-time monitoring Material: ABS with TFT Screen Color: Black+Orange Size: 1647426MM Product weight: 500gFeatures: Electrochemistry sensor for O3 Temperature and Humidity sensor AQI for ozone concentration index Supports 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: SeriousAdditional Features: 2.8" color liquid crystal display (LCD) with 320x240 pixels User adjustable alarm threshold for O3 to alert user of elevated levels Test variables include temperature and 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 warningPackage Includes: 1 x Ozone Meter