The FAI-CCA Freeze Alarm Intermediate paired with the XLINK Cellular Bluetooth Gateway is an affordable and powerful temperature alarm solution for places with no land lines. Simply install the Freeze Alarm Intermediate by plugging the unit into a power outlet and plugging the included phone cord into the XLINK Device. Then place your Bluetooth compatible cell phone beside the XLINK Device and make sure the Bluetooth technology connects them wirelessly. When you call that cell phone your Freeze Alarm will answer and walk you through the entire setup process! Program in your low-temperature alarm points, as well as the dial-out phone numbers, and you are protected from Freezing conditions!