Features: *Timing arm and disarm.*Support SMS and dialing alarm.*Support 5 alarm phone numbers and 2 SMS alarm mobile numbers.*Support up to 99 wireless defense zones.*Smart GSM alarm system with APP, support remote arm and disarm by APP. (Note: No Wifi Function)*Remote operation and settings by SMS APP. ( APP for Android and IOS system )*LCD screen display and voice prompt for all operations.*Support external wired siren and wireless siren, with squealing alarm sound.*English, German, Chinese three languages optional.*Intercom and monitoring function.*Multiple types of arm: Remote control arm, out arm, home arm, timed arm.*Support coercion password, secretly make calls in emergency*Can record 10 seconds alarm voice.*SMS prompt automatically about low power of battery.*SMS prompt when AC power lost or recovered.