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Asian businessmans hand using fingerprint sensor door lock, modern doorbell with video camera.

Close-up photo. The hand of a young man in a white shirt calls the intercom of the house, presses the button, waits for the door to open.

Hand of a man in a white shirt pressing the button of a door knocker on a white wall of a house, a smart door knocker with a video camera for communication

A hand is turning on a light switch at the livingroom in a house.

Open or close window

Businessman enters finger password lock code on alarm panel, on white wall, rear view of man with beard

Businessman enters finger password lock code on alarm panel, on white wall, rear view of man with beard

Businessman enters finger password lock code on alarm panel, on white wall, rear view of man with beard

Businessman enters finger password lock code on alarm panel, on white wall, rear view of man with beard

Doorbell with remote door opening near the vintage door, in the old part of town

Entrance doorbell on the wall a video camera and remote opening

Close-up photo. The hand of a young woman in an orange shirt pressing a metal elevator button with her finger in an office center, hotel, house.

Close-up photo of the front door to an apartment building and office center, with a doorbell