I recently had to buy car alarms for both of my cars. This is because they didn't already come with alarms and they were broken into. I didn't want this to happen again so I started searching for a great deal on car alarms. I shopped around and found a great price on the alarms and on the installation too. I couldn't pass the offer up. There haven't been any car break ins lately but I have heard the alarms go off once. Hopefully it won't happen again or I'll need to install cameras to see who is doing it.