Allows consumers to remotely arm/disarm the M1 control. ElkLink Mobile is available for iOS and Android Devices
https://elkproducts.com/c1m1-dual-path-alarm-communicators/
C1M1 Dual Path Alarm Communicators
ELK-C1M1LTEA Manual
ELK-C1M1LTEV Manual
ELK-C1M1 Setup Addendum