Feature:1. 3 IN 1 MONITOR: Detects particulate matter(PM 2.5), humidity, and temperature. PM2.5 is a major component of air pollution, and fine particles smaller than 2.5 microns(PM2.5) can penetrate deep into the respiratory tract when inhaled2. PROFESSIONAL ACCURATE DESIGN: This air quality meter uses advanced sensors to reflect air quality by detecting PM2.5 particles. The reasonable inlet and outlet duct design enables the internal sensor to accurately analyze each particle. The PM2.5 index is updated every 5 seconds, and the temperature and humidity are updated every 1.5 seconds for a more comprehensive understanding of air quality3. COLOR SCREEN: Multi color screen with all round viewing technology, you can clearly see the air quality monitor display PM2.5 indicators, temperature, humidity from any angle4. EASY TO USE: This air quality tester does everything with just 1 button, plug and play, using a MicroB USB interface5. LONG LIFE: Air quality detector built in 1600mAh large battery, lasting life. Turn on the switch to obtain the PM2.5 index, temperature and humiditySpecification:Item Type: Air Quality MonitorPM2.5 Technology: Light scatteringTemperature and Humidity Technology: Temperature and humidity sensorPM2.5 Detection Range: 0-999 ug/mBattery: 1 x 18650 1600mah batteryDisplay: HD LCD screenAtmospheric Pressure: 86Kpa-106KpaSampling Time: 1.5 SecondsDetection Temperature: -10 to 50Detection Humidity: 20%-85%.Package List:1 x Detector1 x User Manual1 x USB Cable