This unit is a 2004 mobile Scott air compressor (Liberty one) with Scott’s rapid rotate fill system. The air compressor can be powered by either the Electric motor or diesel engine. The compressor will pump 25.5 cubic feet of air per minute filling high pressure SCBA bottles two at a time in a three minute time span from empty (a rate of one bottle filled every 90 seconds). In addition to the air filling capability the unit has a 7200 watt generator with an elevated light tower of four 500 watt halogen lights.