AuYou GSM Cellular Network Wireless Home Security Alarm System Kit with Auto Dial + Outdoor Siren, Quad-band Support Network for Protection of Houses, Apartments, Garages, and Cottages GSM super wireless signals, voice prompt, simple operation. Can install GSM cards, compatible with China Mobile and China Unicom's GSM mobile phone cards. This GSM Alarm Control Host has 6 wireless zones, 4 wired zones, there are 5 kinds of zone types to choose at each zone; Can set Ordinary zone, At home zone, Intelligent zone, Emergency zone, Closed zone. Can use APP to set and manage the host, support IOS/Android operation systems; Remote monitoring, intercom function, built-in intercom speaker. Built-in NI-HI charging battery, automatically convert backup battery and send SMS tips once poweroff. 10 seconds ISD automatic message recording; 2 Groups timing alarm / disalarm systems.