With a pressure gauge, universal sleeve, and easy pump, this is a great pumping system for your package!
Just slide your cock through the sleeve, and start pulling the trigger until your bulging cock is where you want it. The pressure gauge makes it easier to practice a strict pumping regimen, which is important if you're shooting for long term growth. If you pump a little too high you can always step down with the pressure release valve.
Pumping is a great way to get an instant and unnaturally huge erection. Who doesn't want that?