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2. Marie Van Brittan Brown and Albert L. Brown - Wikipedia

   en.wikipedia.org/wiki/Marie_Van_Brittan_Brown...

   The camera was connected by radio to a television monitor mounted on a control panel inside the home. The television monitor allowed the occupant to see who was at the door without opening it while the microphones and loudspeakers allowed the occupant to communicate radiophonically with the visitor.

3. Video door-phone - Wikipedia

   en.wikipedia.org/wiki/Video_door-phone

   Video door entry consists of both outside and indoor elements: an outdoor panel on the outside, an electronic lock release, and an indoor monitor. The outdoor panel or street panel is installed beside the entrance door or gateway and incorporates different elements ready for use in any climate conditions: one or several pushbuttons to make the call (usually one per home or apartment), a micro ...

4. Home security - Wikipedia

   en.wikipedia.org/wiki/Home_security

   A home security camera system software on a Windows laptop for monitoring. Home security includes both the security hardware placed on a property and individuals' personal security practices. Security hardware includes doors, locks, alarm systems, lighting, motion detectors, and security camera systems. Personal security involves practices like ...

5. Closed-circuit television - Wikipedia

   en.wikipedia.org/wiki/Closed-circuit_television

   Many of these cameras however, are owned by private companies and transmit data to drivers' GPS systems. Highways England has a publicly owned CCTV network of over 3000 pan–tilt–zoom cameras covering the British motorway and trunk road network. These cameras are primarily used to monitor traffic conditions and are not used as speed cameras.

6. Smart doorbell - Wikipedia

   en.wikipedia.org/wiki/Smart_doorbell

   The smart doorbell lets the home owner use a smartphone app to watch and talk with the visitor by using the doorbell's built-in high-definition infrared camera and microphone. They can be either battery operated or wired. [1] Some smart doorbells also allow the user to open the door remotely using a smart lock. [2]

7. Smart lock - Wikipedia

   en.wikipedia.org/wiki/Smart_lock

   A smart lock is an electromechanical lock that is designed to perform locking and unlocking operations on a door when it receives a prompt via an electronic keypad, biometric sensor, access card, Bluetooth, or Wi-FI from a registered mobile device. These locks are called smart locks because they use advanced technology and Internet ...