Anything that is operates wirelessly in Pakistan is a waste of money unless its based off of CDMA technology as GSM frequency has long been cracked. A 4k rps GSM blocker will rendered your "alarm" or "anti-theft" device useless. Sure it looks fancy but that's not going to help you keep your vehicle.
I've installed a "choor switch" on my car that only I know where its at that allows my car to even run, it has to be manually turned on everytime, thats on top of an alarm the car came equipped with. The key thing to remember is to NOT splice into the starter positive as thats completely useless because one can always circumvent the starter. Keep it simple and affective and everything else beyond that is for show.
Kruso