User
Friendly System Operation. The Visitor presses the bell
push button of the door-phone / video-phone installed at
the entrance, now just pick up the handset to talk to the
visitor at the entrance. After Identification you may use
the electronic lock feature to unlock the lock installed
on the door.
Since you are now opening doors to know persons
and not to total strangers, besides taking care of your
security the system is innovative convenience.
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