... mobile call GSM alarm system,home guard gsm sms alarm system,wireless calling system,gsm auto dialalarm ... /4 Band Net transmission, phone audible alarming and SMS alarming; 3. 15 wireless zones. Support 2 more ... back;7. Arm/Disarm the system by 5ways: SMS, Main Host(Keypad), Wirless keypad, keychian remotes, ... remotely by phones. (PSTN alarm don't support SMS);8. Available in AC/DC with Low-voltage ...