Fire Siren self-24 Vdc Container thermoplastic material with high resistance level of protection IP34. Ability to detect the status of battery to exclude lampeggiatore. Protection against short circuits of lampeggiatore. Protecting the reversal of polarity of the battery cables and related signaling devices. Blinker from 5W (with capacity pilot until 18 W). Possibility to select two types of noise. Rated voltage power: 27.6 Vdc Voltage input on AL: 21 Vdc 28Vcc. Host Battery: 1 to 2 Ah or 6 Ah. Consumption at rest (with battery charging): 80 mA. Maximum current batteries: 300 mA. Sound Performance: 106 dB at 3 m. Excursion fundamental frequency: 800? 1800 Hz. Operating Temperature: -25-55 C. Size: 285 (W) x 205 (H) x 100 (D) mm. Weight (without battery).