... zones gsm alarm system3.two-way voice communication4.the system supports the gsm cell phones,no need the fixed ... line5.can set home arm/away arm6.when alarming,system plays the recorded voice at first,call six phone ... disarm,panic from long distance.10.can control the system by using a telephone or cell phone anytime, ... in total.12.send the SMS to GSM alarm system to program,it is very easy and quick ...