The Telguard TG-1 Express Universal Residential LTE Cellular Alarm Communicator (designed for AT&T) provides the ideal solution for residential applications. The TG-1 Express transmits full data from residential security and fire systems to central stations using the nationwide AT&T cellular network in the US. In Canada, it uses Rogers, Telus, and Bell Mobility for coverage. Today’s modern family commonly chooses to use their cell phone or VoIP service instead of paying for a traditional phone line. This growing trend makes what was once the most common form of communication for the security system unavailable in many new installations. When there is no telephone service available from your customer’s home, Telguard model TG-1 Express ensures that critical alarm information reaches the central station, and can provide a new set of features including remote arming/disarming. Pack of four (4) TG-1 Express units in this great value bundle.