Your shop may look clean, but how clean is the air? The PM1200 Air Filtration System traps up to 99% of all 5-micron particles and 85% of all 1-micron particles for a healthier work environment. Three blower speeds modify air flow. The unit can be operated either at the cabinet or with the remote transmitter which uses radio-frequency, eliminating the need for line-of-sight operation. The timer has nine settings, allowing continuous operation for up to 9 hours while you're away, and will shut off at the end of that period. The filter guards can be removed and installed without tools, for instant filter access.