Inactive infrared intruding detector (up to 10) Wireless door/window gap detector (up to 10) Wireless remote controller (two or more) Have 5 groups dialing (two times in turn), voice alarm and live monitoring Remote control and emergency alarm Monitor the voice in home when alarm You can program your 4 groups text messages in the home base with UPS, continues to work for 48 hours once power disconnect,support 3 frequency:850MHz,900MHz,1800MHz,1900MHz