Dual tone, engineered with off chords to grasp attention in order to enhance warning effectivenessIdeal for noisy industrial areasEnergy efficient with hermetically sealed diaphragm assembly which operates on a wide range of pressure without tuning or adjustment.Constructed of high strength cast aluminum with stainless steel diaphragm disc and fastenersOperates with electric solenoid or other actuating valves of 1/2" pipe size or greater.Product Specifications LENGTH INCHES12-3/4 WIDTH INCHES13-1/4 HEIGHT INCHES7-3/4 CONSTRUCTIONCast Aluminum and Stainless Steel MANUFACTURERS PART NUMBERK-25 VOLTAGE--- WEIGHT LBS.11.5 BRANDKahlenberg DECIBEL141 dB(A) @ 1M FREQUENCY370/620 Hz PRESSURE REQUIRED30-150 p.s.i. PRODUCT GROUPIndustrial Horn AVERAGE AIR CONSUMPTION48 SCFM AIR CONNECTION1/2 FNPT