I got a set up from a company called klienn. Tank is .5 gal cuts off at 120 psi and and there are two horns and both have its own solenoid. There site says there rated at 152 db at 100psi and 154db at 120psi. I'm considering taking it back and getting the horn blaster set up with 2 horns a 2 gallon tank one solenoid cuts off at 145 psi. Witch would be louder.