The audio doorbell Specifications/Special Features:
       Outdoor station

• Our doorphone Support 3 Users+ 1 Administrator.

• The smart doorbell Support Any Phone [Any Mobile Or Land-line Phone Regardless Of Region].

• The access control No any installation or wiring required for indoor apartment.

• nbuilt Quad-band 850/900/1800/1900Mhz GSM module, 3G & 4G is  optional;

• Secure-using caller ID for identification, unknown callers are ignored.

• Support SMS, PC software to edit information for resident by SMS Text commands.

• Relay Outputs (NC/NO) for outdoor station.

• User friendly design, TFT Screen, alloy outer case and enduring lifespan;