ang alam ko din impossible daw kopyahin ang frequency ng viper compared to ordinary alarm remotes. and if ever pano nila kokopyahin yung frequency? before kasi nagpa duplicate ako ng remote. what the shop owner did was copy the frequency from my remote using some gadget, then tuned the new remote to the same frequency and voila! ok na. i wonder lang if carnappers get a hold of this gadget, then useless na gumamit ng alarm.