Wireless Apartment Intercom System app for iPhone and iPad

Advantages:
-Open the gate with a FREE call from authorized phones;
-Each room has an opening door password and 5 authorized phone numbers and 10 IC card;
-Inbuilt Quad-band 850/900/1800/1900Mhz GSM module, 3G is optional;
-User Friendly Design, LED Screen, Alloy Shell and keypad, Easy for installation;
-Authorized 200 households open the gate, designed for large apartment;
-High quality two-way communication, or carries out the open door action on the first ring (Be switchable);
-Nice price, Functional and practical, No indoor extension, No cabling cost, lower maintenance costs later;
-2 Relay Outputs (NC/NO), compatible with Electronic Locks and CCTV Camera;
-12V DC Power supply, Relay working time is programmable (1~300 seconds), when it is 0 second, indicating no action.