Found it for about 260 on the internet. I also want to go with the Invisibeam® Field Disturbance Sensor508D, Digital Tilt Motion Sensor507M, Backup Battery Siren515R, Backup Battery System520T, and Audio Glass Break Sensor506T. Basically I want everything I can get to help keep my truck safe. How hard is it going to be to install? The site Id order it from says they will give me a wiring diagram for my truck to help make install easier. Is there anything else I need to get?