Interior analogical siren fed from bow. Designed, made and certified according to norm EN54-3. He has an acoustic exit of 70 dB to 1 meter with selection of 3 tones. Entry for option of supply from external source. System of acoustic supervision by means of internal microphone. Up to 60 units fed from the own analogical bow. I consume: 4,5 mA (alarms); 820 µA (rest). For facilities in interior (protection degree IP21). Temperature of functioning:-10 °C to 70 °C. Dimensions: Ø127 x 47 mm. Red color. It needs base SPB-2R for his hookup.