■Ten defense zones can be set as common defense zone, home defense zone, intelligent defense zone or closed defense zone and other types. ■Telephone (mobile phone) or SMS to remotely set up the system of the host. It is innovatively compatible with China Mobile's Fetion function, so as to save the SMS fee generated by users sending SMS to set up the subscription system. ■6 wireless and 4 wired defense zones, multiple accessories can be added to the defense zone. ■6 groups of voice calls, 3 groups of SMS alarm numbers, 10-second ISD automatic message recording ■1 set of normally open signal output, which can be connected to an external electrical appliance for linkage alarm output. ■Built-in a variety of voices, so that the caller can know the exact location of the alarm. ■Built-in a variety of text messages, users can send text messages or Fetion to query the status of the host; the content of text messages in the alarm zone can be modified. ■Wireless intelligent learning code matching, compatible with 2262 common codes and millions of codes, convenient and flexible to add or remove accessories. ■Mobile phone (telephone) remote control arming, disarming, monitoring, intercom, shouting and other functions. ■EEPROM information protection, the information will never be lost. ■Built-in NI-HI rechargeable battery, automatically switch to backup battery when power off and prompt with short message. ■ AC and DC dual-purpose, 24-hour uninterrupted normal work. ■The host adopts two-band, three-band and four-band GSM/GPRS wireless industrial modules, which are stable and reliable. (This paragraph is a two-frequency GSM module)