The OHD QuantiFit2 incorporates OHD's scientifically proven and patented Controlled Negative Pressure (CNP) technology to directly measure respirator leakage. This innovative technology offers the fastest, easiest, and most precise respirator fit test on the market, providing optimum fit and protection for you and your staff. Take your fit testing to new heights, even while outdoors. With QuantiFit2's battery packs, you can operate without wires, while friendly animations guide you through each exercise and AutoStart enables touchless testing. Say goodbye to the limitations of traditional fit testing.