Features AIR CONVECTION TECHNOLOGY: Air quality monitor has 10 in 1 multi function, measurement is more sensitive, accurate and reliable, and users are more assured 4.3IN LCD SCREEN: The air quality monitor multicolor screen use omni directional viewing technology, so you can clearly see the value from any angle EASY TO USE: This air quality tester use only 3 buttons, and the top button operation is simple and intuitive, all operations can be done with 3 buttons STRONG BATTERY LIFE: Air quality detector support plug and play, using MicroB USB interface, built in 3000mAh large battery, bring lasting battery life TECHNICAL PARAMETERS: Indoor air quality monitor atmospheric pressure from 86Kpa‑106Kpa, PM2.5, PM1.0, PM10 detection range is 0‑999 ug/m³ Specification: Item Type: Air Quality Monitor Battery: 1x3000mAh rechargeable lithium battery Atmospheric Pressure: 86Kpa-106Kpa PM2.5, PM1.0, PM10 Detection Range: 0-999 ug/m³ Detection Temperature: -10℃ to 50℃; 14℉ to 122℉ Relative Humidity: 20%-85% Package List:1 x Host1 x USB Cable1 x User Manual Package List 1 x Host 1 x USB Cable 1 x User Manual