Model 450E electronic horn offers a patent pending electronics design that produces a very loud, clear and distinctive electronic tone. This model is capable of producing sustained tones or coded blasts through push button or PLC control devices without duty cycle or interval limitations. The 450E is ideal for general alarm, start and dismissal, coded paging, and process control signaling in areas of high ambient noise levels. Additionally, the 4-wire terminal block and supervisory diode design also makes this unit ideal for Fire Alarm Applications.