Functions 1) Supports both GSM and PSTN networks. 2) Quad Band: 850/900/1800/1900MHz 3) 2 sections voice record (every one max1 minutes ) 4) 20 alarm memory number, 1-10 SMS number and 11-20 dialing number. 5) 4 operation trigger Input + /- 6) 4 controllable outputs by SMS or keypad 7) Friendly LCD display operation 8) Remote monitoring site and talking via phone 9) Arm and disarm the alarm system by SMS and keypad 10) Free charges. the call from authorized number control Output 4 turn ON/OFF 11)Multi-languages optional (English,Italian,Spanish,French,Dutch,German menu and manual) 12)Two way communication.