The DEI 508D uses an RF field to detect objects of sufficient mass that move within a defined area. Great for Convertables.
An object intruding the "outer-zone" triggers the 1st stage output or "warning-zone", such as siren chirps or the 516T voice. Intrusion into the "inner-zone" triggers the alarm.
Directed Electronics(DEI) is the world leader in remote start technology and has pioneered a series of modules designed to allow the original equiptment to work along side the add-on aftermarket security system or remote starter. These modules are known as ByPass Modules or Transponders, etc. These items are required items in the installation of any security system or remote starter and do not compromise the original equiptment in any way.