Features AIR CONVECTION TECHNOLOGY: 10 in 1 multifunctional, more sensitive, accurate and reliable measurement, and more reassuring for users. 4.3IN LCD SCREEN: The multi color screen adopts omnidirectional viewing technology, allowing you to clearly see the values from any angle, making the tester aesthetically pleasing and elegant. EASY TO USE: This air quality tester only uses 3 buttons, and the top button operation is simple and intuitive. All operations can be completed with 3 buttons. STRONG BATTERY LIFE: Air quality tester is plug and play, uses MicroB USB interface, and has a built in 3000mAh large battery, providing long lasting battery life. EASY CARRYING: Small and compact in size and being light in weight make the air quality monitor easy to carry for convenient use. Specification: Item Type: Air Quality Monitor Material: Aluminum Alloy Battery: 1 x 3000mAh rechargeable lithium battery (shipped with built in battery) Atmospheric Pressure: 86Kpa to 106Kpa PM2.5, PM1.0, PM10 Detection Range: 0 to 999 ug/m ³ CO2 Detection Range: 400 to 5000 ppm Detection Temperature: -10 ℃to 50 ℃; 14 ℉ to 122 ℉ Relative Humidity: 20% to 85% RH Package List:1 x Tester 1 x USB Cable 1 x Manual Package List 1 x Tester 1 x USB Cable 1 x Manual