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Electronic siren for fire alarm systems. Electronic siren with refined aesthetics and innovative technology, completely covered by polyurethane resin that guarantees a high degree of protection and resistance. Maximum control of the sound signal thanks to the 28 selectable tones during installation via 5 internal dip-switches and volume control via trimmer. Installation is simplified by the bayonet coupling of the siren on the backplate and the double terminals which allow connection branching.