This product is a multifunctional air quality monitor that detects Carbon dioxide (CO2),Formaldehyde (HCHO), Total Volatile Organic Compounds (TVOC), Particulate Matter <2.5 micron-sized particles (PM2.5/1.0/10), Temperature, and Humidity with clock and record function. As a scientific air quality detection device, it combines multiple air sensors with a built-in fan to allow real-time monitoring of Carbon dioxide (CO2), formaldehyde (HCHO), total volatile organic compounds (TVOC), PM2.5/1.0/10, temperature, and humidity on its digital LCD display. Come on and try it. [Specifications] Display Method:4.3 LCD screen display, 480 x 270 pixels Atmospheric Pressure: 86Kpa - 106Kpa Detection Method for CO2 : Infrared (NDIR) Particulate Matter: Laser Scattering Formaldehyde: Electrochemistry Sampling Time: 1.5 seconds Resolution of CO2 :1ppm Product Size: 145 x 78 x 97.2mm Detection temperature: -10C to 50C; Relative humidity: 20% - 85% Storage temperature: -10C to 60C; Concentration unit for CO2:PPM Concentration unit for HCHO: Mg/M Concentration unit for TVOC: mg/M Concentration unit for Particulate Matter: ug/M Power source: Lithium battery with 3000 mah capacity; 5V DC power charging via micro USB port Product weight: 225g [Measuring Range] HCHO:0.000-1.999Mg/M TVOC:0.000-1.999Mg/M PM:0-9.999ug/M CO2:400-5000ppm Temperature:-10C to 50C;Accuracy:1C Humidity:20% - 85%;Accuracy: 4% [Packing list] 1 * Air Quality Detector 1 * USB Cable 1 * User Manual