Specifications: ProductSpecifications Display method: 4.3 ”LCD screen display,320 x 240 pixels Atmospheric pressure:86Kpa - 106Kpa Detectionmethod for PM:laser scattering Sampling time:1.5 seconds Product Size: 131 x 78 x 67.5 mm Detection temperature: -10°C to 50°C;  Relativehumidity:20% - 85% Storage temperature:-10°C to 60°C; Concentration unit for PM2.5 : ug/m³ Concentration unit for HCHO and TVOC:mg/m³ Concentration unit for CO2 : ppm  Powersource:Lithium battery with 3000 mAh capacity; 5V DC power charging via micro USB port Product weight: 750g   ProductDescription This product is a multifunctional air quality detector 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.