Wired Mini Siren Horn Loudspeaker Trumpet for Home Security Alarm System 110db NEW 12V Wired Mini Siren for Home Security Alarm System Horn Siren 120dB DIY can be plugged into your keypad/Console.It works with your system, responding to signals from an alerted Keypad/Console. Transmit speed: 3H2 increase or discrease 10% No intruder will hang around when one of these sirens sounds!