It's an security system that when it is turned on, it immobilizes the car (cuts fuel pump, ignition). The system on the left pic at the bottom, the system is engaged when you are (and the remote) are 10 meters away from the car. As for the one on the right, you engage/disengage by touching the supplied "key" to the control panel of the system (I suppose this is hidden somewhere). As for the price, they are about 160 bucks.
Hope this is good enough James
Hope this is good enough James