Dual zone sensing</br>Protects both inside and outside of the vehicle</br>Each zone is independently adjustable</br>LED sensitivity test light</br>Pre-wired 4-pin plug allows easy connection to all Omega systems</br></br>Product Description</br></br>Designed to provide both an internal and external zones of protection for the vehicle. When the exterior zone is penetrated by someone?? a pre-warn signal is generated and sent to the security system's pre-warn input. When the interior zone is violated?? the system immediately triggers.</br><br/>http://www.amazon.com/gp/product/B004IAGVZQ