DIY Supplies : Paint & DecoratingCertification : NONEMultifunctional Intelligent Portable Ozone Analyzer O3 Ozone Meter Gas Detector Sensor Air Quality Pollution Monitor (1 Pcs)Temperature and humidity technical indicators. When low battery icon is displayed, the device needs to be charged.Insert the included or another compatible Micro-USB charging cable into the device.Attach the other end to a USB DC charger (such as a smart phone charger) that outputs DC 5V at Greater than =1000mA.Fully charge for at least 2-3 hours before use. Avoid charging with a USB computer port which only outputs 500mA.Display method:3.5 inch LCD displayAtmospheric pressure: 86Kpa - 106KpaDetection method for O3: ElectrochemistrySampling time: 1.5 secondsProduct Size: 130*80*30MMDetection temperature: -10C to 50C;Relative humidity: 20% - 85%Storage temperature: -10C to 60C;Concentration unit for O3:ppmPower source: Lithium battery with 2000mAh capacity;5V DC power charging via Micro-USB portProduct weight: 160gThis product is an air quality monitor that detects Ozone,Temperature, and Humidity. it combines sensors real-timemonitoring of Ozone(O3),temperature, and humidity onits display.Features-3.5 inch LCD display-Test variables Ozone(O3),temperature, humidity-Large 2000mAh capacity Lithium battery-5V Micro-USB charging-Low battery warningO3 technical indicatorsMeasuring range: 0-5PPMSensor for O3: ElectrochemistryResolution: 0.001ppmMeasuring range: -10-50 CMeasurement accuracy: 1 CHumidity range: 20%-85% RHMeasurement accuracy: 4% RHMaterial: plasticcolour: WhitePackage Contents:1 x Air Quality monitorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.