alarm scanner ??

[yahoo1z]

http://cgi.ebay.com/VARAD-EVO-VS350RE-RED-LED-SCANNER-FOR-CAR-ALARM_W0QQitemZ9729174234QQcategoryZ71537QQrdZ1QQc mdZViewItem
what is an alarm scanner? is it just a bunch of leds? how do they work with the arlam system? anyone tried it? thanks

[KeWLKaT]

its to show ooff your alarm system and ''scare'' thieves away