Alptop Security AT-GSM20 Wireless Dual-Network GSM PSTN Home Security Alarm System With Keypad

With dual network of GSM + telephone cable, the System is more secure and reliable.
With the quad-band GSM module for global use.
Includes 2 wired zones and 99 wireless zones.
Supports code pairing with 8 wireless remote controllers at the most.
LCD screen with a built-in clock.
Supports an external intercom speaker.
Supports 3 groups of timed arming and 3 groups of timed disarming.
The main device can dial alarm calls to 6 preset phone numbers.
The main device can send text alarm to 3 preset phone numbers.
With 10-second manual recording function to leave messages.
With a built-in digital voice device to give voice alarm automatically.
With built-in SMS service to send alarm messages automatically.
With the One-Key-Control function, you can conduct Away Arming, Home Arming, Remote Control Arming or Off-site Telephone Arming.
Alarm Location Programming: Help, Fire, Gas Leak, Door Lock, Living Room, Window, Balcony,and Perimeter Alarm.
Off-site remote control allows Main Device Arming, Disarming, Monitoring, Intercom etc.
Arming Modes: Remote Control Real-Time Arming, Away Delayed Arming,Home (Stay) Arming, Timing Arming, Off-site Telephone Remote Arming.
Line Seizure: If an alarm happens, the main device will cut off the busy line and give priority to make a call for the alarm.