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2. 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 ...

3. I Tried the Ring Pro 2 Video Doorbell—Here’s My Honest Review

   www.aol.com/lifestyle/tried-ring-pro-2-video...

   The Ring Pro 2 is an exceedingly useful addition to any home security suite, whether pre-established or as part of the initial video doorbell installation. It offers stunningly clear and smooth ...

4. Electrical wiring - Wikipedia

   en.wikipedia.org/wiki/Electrical_wiring

   The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...

5. Smart doorbell - Wikipedia

   en.wikipedia.org/wiki/Smart_doorbell

   A smart doorbell is an internet-connected doorbell that notifies the home owner on his or her device (smartphone or any other gadget) when a visitor arrives at the door. It activates when the visitor presses the button of the doorbell, or alternatively, when the doorbell senses a visitor with its built-in motion sensors. The smart doorbell lets ...

6. 35 of the very best gifts for seniors that they'll actually ...

   www.aol.com/lifestyle/best-gifts-for-seniors...

   Ring Video Doorbell. $50 at Amazon. Button Assist Device. ... snag free wire loop and zipper puller works with any size buttons. ... It comes with peel and stick tape to make installation easy and ...

7. Electric bell - Wikipedia

   en.wikipedia.org/wiki/Electric_bell

   One of the first was the oscillating electric wire invented by James Marsh in 1824. [6] [5] This consisted of a wire pendulum dipping into a mercury trough, suspended between the poles of an electromagnet. When current was passed through the wire, the force of the magnet made the wire swing sideways, out of the mercury, which broke the current ...