Mom was getting more and more concerned about being broken into. We looked around and selected ACT to install her new alarm system. Living in a Condo, we did not want to have to run any wires to the doors and windows. Dale (he owns the company) showed us how to keep the cost down while maximizing the security. We got the Lynx system. And to make things easy for Mom to arm and disarm the alarm we got the Keyfob, the buttons are big enough for Mom to use even with her arthritis.