Clifford Glass Breakage Audio Sensor - DEI 506T FEATURES: Reacts to the Frequencies Caused by Breaking Glass. Triggers the Siren Even During "Soft Breakage". A MUST Have To Any High-End Security System. Universal In Design, Will Work With Any Security System. Factory Sealed Packaging The 506T provides PRE-ENTRY protection by detecting tampering and breaking of the vehicle`s glass. The Audio Sensor`s reliable CMOS design with a remote microphone analyzes frequency, intensity and timing of intrusion sounds to eliminate false alarms. THIS IS A MUST WHEN IT COMES TO PROTECTING YOUR VEHICLE FROM A PRO! If someone breaks your window using a Porcelain the glass will shatter but a shock sensor can`t detect it. The 506T will register the cracking of the glass and set off the alarm. It is universal in design and will work with just about any alarm system. Clifford Glass Breakage Audio Sensor - DEI 506T