You can install the compact alarm system siren inside and outside of your building. This professional signalling unit is the critical module of a completely functioning alarm chain. The compact alarm system siren is an acoustic signal generator. When an alarm is triggered, it generates an extremely loud signal tone with more than 110 dB of acoustic pressure. The weather-proof aluminum housing (IP 34) of the alarm siren is protected against sabotage by a wall and cover contact and by an additional inside grating. The siren is powered with 12 V (external). The maximum current consumption is 350 mA.