ALEKO BS-PS402M 12V 108dB Mini Electronic Wired Alarm Siren Horn for Security System This electronic siren designed to alert about the alarm situation. It has a large noise power and low voltage. Great for any types of outdoor or indoor security systems. Wired, Low-Voltage, Durable materials, Moisture proof, Shock-resistant capasity, Heat resistant, Single tone Voltage: 12V, Current: 150 mA Color: Black, SPL: 108 3 dB (LOUD)