1 Dual-net (GSM&PSTN) for double protection 2 Built-in GSM Module optional 3 Built-in antenna of panel, PIR detector & door sensor 4 Multi-user mode: each other user can operate preset zones 5 Mono-user mode: away arm /home arm the whole system. 6 Menu operation and audio guidance 7 Multiple access codes for different operation authority 8 4 wired (no.13-16)+16 wireless zones (48detectors) 9 Two timers for different schedule 10 Support 8 phone numbers www.karassnsecurity.com