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. Product specifications: Display method: common screen display Pressure atmospheric:86Kpa-106Kpa CO2 detection method: infrared (NDIR) Sampling time:1.5 seconds Product size:70*80*35mm Detection temperature:-10 at 50 Relative humidity:20% - 85% Storage temperature:-10 to 60 Concentration unit for CO2:PPM Power source: lithium battery d 1600mAh capacity; 5V DC power charging via micro USB port Product weight:150g Product description: This 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. Features: Common screen display Test variables: carbon dioxide (CO2), temperature, humidity 1600mAh large capacity lithium battery Product list: 1* Air Quality Monitor 1* USB Charging Cable