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2. 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]

3. Ring (company) - Wikipedia

   en.wikipedia.org/wiki/Ring_(company)

   A second-generation model, Ring Doorbell 2, was released in 2017, with updated hardware and a 1080p camera with improved low-light performance, that does not rely solely on Wi-Fi, unlike the original model. [44] The Ring Doorbell Pro interoperates with Amazon Alexa to play prerecorded greetings to visitors and allow visitors to leave a message ...

4. Blink Home - Wikipedia

   en.wikipedia.org/wiki/Blink_Home

   Amazon (2017–present) Website. blinkforhome.com. Blink is an American home automation company which produces battery-powered home security cameras. The company was founded in 2009 by Peter Besen, Don Shulsinger, Dan Grunberg, Stephen Gordon, and Doug Chin. The company was initially started as Immedia Semiconductor Inc in 2009, but pivoted ...

5. Video door-phone - Wikipedia

   en.wikipedia.org/wiki/Video_door-phone

   A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building ( residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is ...

6. 1080p - Wikipedia

   en.wikipedia.org/wiki/1080p

   1080p (1920 × 1080 progressively displayed pixels; also known as Full HD or FHD, and BT.709) is a set of HDTV high-definition video modes characterized by 1,920 pixels displayed across the screen horizontally and 1,080 pixels down the screen vertically; [1] the p stands for progressive scan, i.e. non- interlaced.

7. Doorbell - Wikipedia

   en.wikipedia.org/wiki/Doorbell

   Doorbell. A doorbell is a signaling device typically placed near a door to a building's entrance. When a visitor presses a button, the bell rings inside the building, alerting the occupant to the presence of the visitor. Although the first doorbells were mechanical, activated by pulling a cord connected to a bell, modern doorbells are electric ...