The Base Station (the brains of your system) The base is Plug-and-Play: Plug it in and it will locate and control all of your sensors, making SimpliSafe the easiest security system in the world to install. Its also responsible for sending all your alarm signals to our 24/7 alarm monitoring center. Your Base Station will arrive equipped with the same cellular technology thats in your cellphone: Inside there is a SIM card that gets activated when you subscribe to our alarm monitoring service. If youre subscribed to our Interactive Monitoring Plan, it will also send you SMS text Smart Alerts & Secret Alerts.