GSM Alarm System 1.Voice and message alert 2,Set alarm ... patent number: ZL2003 2 0107152.9). GSM Home Alarm System with built-in PIR sensor Feasures and Functions:GSM 900/1800/1900 ... bands, can be used in most parts of the worldMonitor ... by remote controllerCan set Home Arm and Out Arm modeCall in to set alarm ON, OFF, Monitor, Output, and ...