600-1053-4-ZX-AT - GE Interlogix Concord 4 Cellular AT&T GSM Alarm Communicator (Powered by Alarm.com)
Please Note: The GE Interlogix 600-1053-4-ZX-AT Alarm.com AT&T 2G GSM cellular Alarm.com communicator (for the Concord 4 panel) has been discontinued and replaced by the 600-1053-LTE-VZ model number.