The Telguard TG-7FM Multi-Carrier Universal Sole Path 5G LTE-M Commercial Fire Cellular Alarm Communicator is specially designed for panel-powered, sole path, commercial fire applications, offering the best in alarm communications, featuring all 3 major U.S. cellular carriers. The TG-7FM is all about saving time and money. It starts with a 5G LTE-M communicator not only has AT&T, T-Mobile, and Verizon cellular service but also powers off the alarm panel, and costs less to purchase and install than comparable models. Add to that, the reliability of the Telguard products and the features needed to meet all AHJ and UL requirements and you have a fire communicator that will do the job at minimal cost.