Internal analog siren powered from loop with integrated line isolator. Designed, manufactured and certified according to standards EN54-3 and EN54-17. It has 16 tones and 2 selectable volume levels. Maximum acoustic power of 103 dB. Very low consumption (8.5 mA). Up to 40 units powered from the analog loop itself. For indoor installations (degree of protection IP21). Operating temperature: -10 ° C to 55 ° C. Dimensions: 105 x 106 x 91 mm. White color.