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. • Two-filter system traps particles as small as 1 micron. • Diffusion filter disperses exhausted air. • Remote control operates on radio frequency for wider range of effectiveness. • Indicator lights up after 200 hours to remind user to replace filters. • Three blower speeds to modify air flow. • Filter guards install and remove easily without tools for quick access to filters. • Inner filter has fine mesh pockets for high efficiency, can be blown clean. • Four eye bolts allow suspension from shop ceiling. • Timer has nine settings, for up to nine hours of continuous operation.