... host 4.Got CE/ISO/FCC//RoHS etc Double Alarm Ways GSM+PSTN Alarm System Features Business ... and 1 center number 6. Out arm, perimeter arm, single arm, delay and remote arm 7. Real-time, delay, 24 ... second audio for voice-alarm 10. Remote control to arm, diarm, emergency alarm, monitor, telephone line checking 11 ... modified by userOther components for your chosen Double Alarm Ways GSM+PSTN Alarm System