Do not use monitronics, I have waited for 3 hours on hold trying to get ahold of someone who can fix my alarm. After an upgrade I got locked into a contract and had 11 false alarms. The sheriff department said they would no longer respond to the calls leaving my business completely unprotected. I had to take an entire day off work just trying to get ahold of someone who can fix my alarm. As of now, I am completely unprotected so instead of protecting my business, they made my business even more unprotected than it was to begin with. Do not get stuck with this company. I would rate negative stars if I could. They advertisegreat customer service which is false. Getting ahold of a supervisor is next to impossible. Completely unprofessional! Bad Bad Bad!