At 120dbs, this siren will not only alert the neighbors of the intrusion, but scare away the burglar right out of your house!This piercing, plug-in siren can be plugged into your keypad/Console.It works with your system, responding to signals from an alerted Keypad/Console.No intruder will hang around when one of these sirens sounds! Sound index: 120dBSound frequency: 3.8KH2+10%Transmit speed: 3H2 increase or discrease 10% 1 x Wired Siren