What kind of car is it going in to?

It is my personal opinion that the true professional theives will get what they want regardless. The alarm is going to stop the other 99% of theives out there who are looking for a quick smash and grab, and the alarm alone (LED, Viper sticker, etc) is going to make them look for an easier target and probably skip your car.

The glass break sensor would fit into my above statement, which is again my opinion...the theives I want my alarm to stop are likely (and I stress likely) the ones who would just punch out the window/hit it with a rock/etc, and if your shock sensor doesn't go off for that, then it isn't adjusted to where you want/need it to be.

Backup battery depends on whether you are usually within the range of your 2-way remote, because if you are out of range then it doesn't do you much good if a thief cuts your siren, but if you are in range and can grab a bat or large object, go for it. (kidding about that bat part).

The proximity sensor can work well once adjusted right, and I am also a fan of multiple sirens in different spots.


Its all up to you and your needs/reasoning for the different add-ons, they all have their applications...and if your reasoning was to pick a bunch of different add-ons just to have them, well thats cool too. That is just my two cents for what its worth.