ProductSpecifications Display method: 2.8LCD screen display, 240x320 pixels CO2 Technology : infrared ( NDIR) Temperature and Humidity sensor Detection range: CO2 ( 0-6000 ppm) Sampling time:1.5 seconds Product Size:89x70x35MM150G Detection temperature: -10C to 70C Relativehumidity:10 percent - 99 percent Storage temperature:-10C to 60C Concentration unit for HCHO and TVOC: mg or m Powersource:Lithium battery with 1500 mAh capacity 5V DC power charging via micro USB port Product weight: 250g Clean air is important to everyone. Our indoor air quality monitor accurately monitors CO2, HCHO, TVOC, temperature and humidity, all displayed on a high-definition color screen for easy identification and reading. With a convenient design, you can monitor your environment at any time and efficiently measure five key indicators to assess air quality. Equipped with high-performance chip to ensure fast and accurate data. Electrochemical sensors for CO2, HCHO and TVOC using advanced infrared (NDIR) sensor technology. Compared with ordinary sensors, it is more sensitive, more accurate and more stable. Checklist: 1x Air Quality Monitor