basically the one way to know for sure is a 2way alarm hooked up to a backup battery.. i had planned on running the alarm and siren(s) (i had planned on mounting 2 hidin in my interior somewhere) off a backup battery, but never got around to it
they'd have to be ear piercing loud inside .. that way they couldnt stand being inside the car..
they'd have to be ear piercing loud inside .. that way they couldnt stand being inside the car..