Hitachi Power Tools recently released a new portable twin-stack air compressor. The 4-gallon EC99S runs on a 15 Amp oil-lubricated direct drive induction motor, which includes thermal overload protection so it won’t ever overheat. With a weight of just under 53 lbs, it’s lighter than most compressors in this class. It produces 3.1 CFM at 90 PSI and 3.05 CFM at 100 PSI. A locking regulator and on/off pressure switch (105/135) keep the compressor delivering the right amount of air at all times to connected tools. It sells for $199 online.