AQ Expert Indoor Air Quality Monitor will help you perform the most accurate IAQ parameter testing. Easy to Use Menu System, Barometric Air Pressure, Portable w/ Swivel Handle, PC Software & USB Included, Easy Built-in, Menu-driven calibration procedure & Large Internal Memory are some featured that make it more demanding among customers. AQ Expert Indoor Air Quality Monitor is utilized for measuring the quantity of harmful gaseous, dust and dirt particles in the air.