even if you buy your own alarm,..most alarm installers wont touch it because they say some bullshit like "we wont install alarms that are not bought from us" because they want to make money,..i install alarms of any kind for my customers because i dont sell alarms so if they bring in one that they bought then im gonna install it and make my money,...installing alarms arent all that hard,..call me crazy but i like doing electrical work on cars,..most people hate it