my friend was telling me about both of them but i got lost. what do you do to use either of these. im not real good at technology, so can you please give a simple explanation. from what he was telling me, he said that a killswitch is like a lightswitch thats on/off and you just hit ON when you want to start the car and turn the keys like normal but if its off you cant start it. but what is an immobilizer? from what i could understand its like a wireless key that you have to have in the car in order for it to start? please explain it better, i need to use my moms car and she never told me how to use it. i know i have to look for it somewhere in the car but what do i do after that? please help.