Air Shammee II single motor three phase. Junk the trigger nozzle and go with an open design like the Air Logic gun. You will not be able to put it in the Air Shammee holster because it will fly out. Need the short Hamel round holster. If you are my nearby competition and then I would recommend getting the double vac motor style blower and upgrade the gun to the Air Shammee trigger style. (I'll even sell you some of those nozzles too)