GSM Doorphone for 6 apartments with shared front door. Calls can be answered anywhere and the owner opens even from the mobile

With the flexible GSM door phone you can converse with the guest at the door wherever you are in the world.
GSM Doorphone is wireless and can be installed all places, the only thing as the GSM door phone needs,
is a supply and A SIM card as well as a seat for GSM antenna.

is operated by a single press of the button you want the caller to enter programmed telephone number. either landline or mobile phone .

Reply to calls from the GSM door phone, happens by answering the call on your landline or cell phone like a normal call.
Opening door occurs in connection with the conversation when pressing "*" on your phone and door will be unlocked.
Key Free Access: If the phone number calls the GSM door phone is in the program under "Permission to open door", the door lock will be opened.