The Alarm.com CD-411-US-AT is the replacement for the Interlogix 600-1053-LTE-AT that is used for the Concord 4 alarm system. This dual path communicator is a redundant, reliable method of transmitting signal to a central station monitoring service or for using Alarm.com Residential Interactive or Alarm.com Commercial Interactive services. This communicator sends signal through the AT&T LTE network and can be used with Concord 4 panels that are version 4.0 and up. The communicator measures 4 1/16” H x 1 7/8” W. It operates on Quad-Band frequency and can send signals to a monitoring station and/or be used for self notification and remote control of the alarm system using the Interactive services. It also contains a Z-Wave home automation control which will allow you to set up a Z-Wave network for control of those items via your Alarm.com account as well. The communicator features 4 status light LEDs to help troubleshoot problems and let you know everything is working. It can be mounted in areas with temperature ranges from 32 to 120°F. This powers off of the main control’s 12v power. It consumes 65 mA (continuous) and 1600 mA (instantaneous peaks) maximum (from panel or auxiliary power supply).