ive got one in my car
3 point immobilser
shock sensors
interior sensors
back up battery siren
window lifts (option)
basically all the usual crap needed for insurance
oh i also forgot make sure its installed properly
dont let them put the module in the kick panel like wat they did to me, resulted in water damaged module which was then replaced by a faulty one
car was off the rd for a month because they couldnt make an effort to come and fix the problem