Temperature and humidity technical indicators. When low battery is displayed, the device needs to be .<br> Insert the included or another compatible -USB charging cable into the device.<br> Attach the other end to a USB DC charger (such as a smart phone charger) that outputs DC 5V at =1000mA.<br> Fully charge for at least 2-3 hours before use. Avoid charging with a USB computer port which only outputs 500mA.<br> Display :<br> 3.5 inch LCD display<br> Atmospheric pressure: 86Kpa - 106Kpa<br> Detection for O3: Electrochemistry<br> Sampling time: 1.5 seconds<br> Product Size: 130*80*30MM<br> Detection temperature: -10C to 50C;<br> Relative humidity: 20% - 85%<br> Storage temperature: -10C to 60C;<br> Concentration unit for O3:<br> Power source: Lithium battery with 2000mAh capacity;<br> 5V DC power charging via -USB port<br> Product weight: 160g<br> This product is an air quality monitor that detects Ozone,<br> Temperature, and Humidity. it combines sensors real-time<br> monitoring of Ozone(O3),temperature, and humidity on<br> its display.<br> Features<br> -3.5 inch LCD display<br> -Test variables Ozone(O3),temperature, humidity<br> - 2000mAh capacity Lithium battery<br> -5V -USB charging<br> -Low battery warning<br> O3 technical indicators<br> Measuring range: 0-5PPM<br> Sensor for O3: Electrochemistry<br> Resolution: 0.001ppm<br> Measuring range: -10-50 C<br> Measurement accuracy: 1 C<br> Humidity range: 20%-85% RH<br> Measurement accuracy: 4% RH<br> Material: plastic<br> colour: White<br> Package Contents:<br> 1 x Air Quality monitor<br> Only the above package content, other products are not included.<br> 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.