Feature: 1. 3 IN 1 TESTER: This tester can be used to measure temperature, humidity, and PM2.5. Monitor the air quality in your home, office, etc. 2. TIMELY ACCURATE MEASUREMEMT: Reasonable inlet and outlet duct design enables internal sensors to accurately analyze each particle. Update the PM2.5 index every 5 seconds, and update the temperature and humidity every 1.5 seconds to gain a more comprehensive understanding of air quality. 3. COLOR SCREEN: Multi color screen adopts omni directional viewing technology, enabling you to clearly see the PM2.5 indicators, temperature, and humidity displayed by the air quality monitor from any angle. 4. EASY TO USE: Air quality tester uses only one button to complete all operations. Turn on the switch to obtain the PM2.5 index, temperature, and humidity. 5. ABS MATERIAL: Made of premium ABS material, the air quality monitor is wear resistant and impact resistant, ensures a long life span. Specification: Item Type: Air Quality Monitor Material: ABS PM2.5 Technology: Light scattering Temperature and Humidity Technology: Temperature and humidity sensors PM2.5 Detection Range: (0 to 999 ug/M ³) Battery: 1 x 18650 1000mah battery (shipped with built in battery) Display: HD LCD screen Atmospheric Pressure: 86Kpa to 106Kpa Sampling Time: 1.5 seconds Detection Temperature: - 10 ℃ to 50 ℃ Humidity: 20% to 85% Storage Temperature: - 10 ℃ to 60 ℃. Package List: 1 x Monitor 1 x Manual 1 x USB Cable