The Porter-Cable C2150 is a 2 HP 4 Gallon Job Boss Oil-Free Portable Pancake Style Air Compressor. It starts with the fact that it comes standard with a mobility kit with retractable handles to make the unit easy to move and easy to store. It also has an oil-free pump which is designed for durability and long use. It also packs 150 PSI in the tank for longer tool run time.