Item Specifications: Trumpet Trumpets Size:6.5"/9"/11.5"/13.5"3.5 165/230/295/350×90(dia)mm Volt:DC 12V/24V Current:4.0A Sound Level:135dB Operation Air:43-116 PSI(0.3Mpa-0.8Mpa) Material:Chrome plated zinc alloy Color:Black.