Car Alarms: dual stage shock and proximity sensor for 2008 Durango and Avenger, microwave sensors, 2008 dodge avenger

Question
I just bought a 2008 Dodge Durango Limited and 2008 Dodge Avenger, both have factory alarm, transponder remote key, and remote start.  I want a dual stage shock and proximity sensor to add to both vehicles.  Any suggestions/recommendations?

Answer
No, not unless these are aftermarket car alarm/remotes start
devices, there is no way to add a microwave motion sensor.

Even if they were aftermarket, you'd still need to know
the system's capabilities to be able to interface a
sensor.

You will need to identify what systems are in both cars prior
to getting these to see if they are compatible.

Microwave sensors are 36. each.

ALARMTEK