Mr. Bill I posted back to your question call me Id be happy to discuss in depth with you about the booster and any outher type booster you may have found. I have had 4 difrent types before hascal types and dule stage types aswell al very gas gready not very efficent.MY # is 337-258-2542. The simpliest way i can explane it so that airgunners can understand it is take a hand pump, use air to pump it instead of your hands and high presure air on the intake side instead of an open air intake check valve.Ok I no then its a compressor right no reason being it cant compress ambient air as a hand pump or a true compressor can a booster has to have a head presure to boost from. Does this help a little .