Features:  2.8-inch color liquid crystal display (LCD), 320x240 pixels.  User adjustable ozone (O₃) alarm threshold to alert the user to increase.  Test variables: PM2.5/1.0/10, ozone (O₃), TVOC, temperature, humidity.  1200mAh large capacity lithium battery.  Onboard fan draws in ambient air for more accurate real-time results.  5V Micro USB charging.  Low battery warning.  The product is a multi-functional air quality monitor that can detect total ozone (O₃) volatile organic compounds (TVOC), particulate matter (PM2.5 / 1.0 / 10) with a size of less than 2.5 microns, temperature and humidity, clock and recording functions.  As a scientific air quality testing device, it combines multiple air sensors with built-in sensors.  The fan can monitor ozone (O₃), total volatile organic compounds (TVOC), PM2.5 / 1.0 / 10, temperature and humidity on its digital LCD display.     Specification:  Display mode: 2.8-inch LCD screen, 320 x 240 pixels;  Atmospheric pressure: 86Kpa-106Kpa;  PM detection method: laser scattering;  Sampling time: 1.5 seconds;  Product size: 155 x 87 x 35mm;  Detection temperature: -10°C to 50°C; 14°F to 122°F;  Relative humidity: 20%-85%;  Storage temperature: -10°C to 60°C; 14°F to 140°F;  TVOC concentration unit: mg /m³;  Oxygen concentration unit: ppm;  Power supply: Lithium battery with a capacity of 1200 mAh; 5V DC power supply for charging;  Via micro USB port;  Measuring range: O₃ (ozone) PM2.5 PM1.0 PM10 TVOC Temperature Humid;  Product weight: 350g.     Package included:  1 * Air Quality Monitor;  1 * USB cable;  1 * Instruction.