Eteyo Security Alarm Burglar System Quad 4 Bands for Global Useoff-site Remote Control with GSM and Telephone Cable, the system is mDual Network ore security and reliable, more safe if one doesn't work Supports and external intercom speaker Timing Arming & Disarming: 3 groups for each Store 6 groups of telephone number and 3 groups of SMS Message number, the main device auto makes a voice alarms and send SMS message. With One-Key-Control function, you can conduct Away Arming, Home Arming, Remote Control Arming or off-site telephone Arming. Alarm location programming: Help, Gas, Gate, Lock, Hall, Window, Balcony and Perimeter Alarm Signal.