This 3-in-1 air quality monitor helps you get real-time temperature, relative humidity and CO2 concentration. Let you have a cool and comfortable living and working environment.bProduct specifications:/bDisplay method: common screen displayPressure atmospheric:86Kpa-106KpaCO2 detection method: infrared (NDIR)Sampling time:1.5 secondsProduct size:70*80*35mmDetection temperature:-10 at 50Relative humidity:20% - 85%Storage temperature:-10 to 60Concentration unit for CO2:PPMPower source: lithium battery d 1600mAh capacity;5V DC power charging via micro USB portProduct weight:150gbProduct description:/bThis product is an air quality monitor that detects carbon dioxide (CO2), temperature and humidity. It combines sensors for real-time monitoring of carbon dioxide (CO2), temperature and humidity. moisture on its screen.Precautions:Avoid covering the areas admitted ventilation during use to avoid inaccurate measurements.Avoid using solvents to clean the product as residual vapors will distort air quality measurements.Avoid water or other liquids near the product to prevent electrical damage.Do not allow unauthorized modification or repair of this product.bFeatures:/bCommon screen displayTest variables: carbon dioxide (CO2), temperature, humidity1600mAh large capacity lithium batterybProduct list:/b1* Air Quality Monitor1* USB Charging Cable