The Telguard TG-4 Universal LTE Primary/Backup Cellular Alarm Communicator (designed for AT&T) provides the ideal solution for residential and light commercial applications. It can serve as a primary communication path to transmit alarm signals over the nationwide AT&T LTE networks, while monitoring an incoming phoneline if the telephone line or data network has been disrupted, compromised or when there is no wire line service available. In Canada, it uses Rogers, Telus, and Bell Mobility for coverage. The TG-4 LTE, the ideal solution for light commercial, business and residential applications, transmits full data from security and fire systems to central stations. Backup battery included with this bundle.