Got Protectron to install our alarm system. Signed up for a contract to get free installation and first year free. Then found out because we don't have a land line, they had to charge us more. We still decided to go through with it. Even though it was first month free, they still charged our credit card. It's a good thing I am someone who takes the time to review my bills. They charged us twice in one month even thoughe carge. h it was supposed to be first year free. We called twice in order for them to reverse the payment. Instead of reversing it, they simply kept the money and said it will be applied to my bill next year. They won't reverse the charge. Pay attention if you have established prepayment thru your credit card.