x2. not to mention the rude shock when the remote you buy costs more than the alarm itself did. add to the fact that the effective TESTED range on 90% of them is 300m. that becomes even less if your car has factory lead tinted windows. (try 10m -that's the best I have seen)
if you want paging done properly buy a GSM paging unit. many flavors available the three that are mentioned though are the better ones. (DEI ,autowatch, mongoose )