u also want a hoodlock and a extra siren with buildinbattery, so even if they disconnect the batter and backup battery and even take the alarm out
the siren will continue to go off unless u have the key to turn it off

 

and do any of these come with an ignition kill? I know my girlfriends civic came with a cheap lookin viper alarm and if it goes off, you cant start the car tell you press a button on the remote... even if you disconnect the battery. (i found out the hard way when i was working on it and didnt have her remote)