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  2. Ring (company) - Wikipedia

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

    The "Ring Chime" accessory is a unit plugged into a power outlet to play the doorbell's chime. The "Chime Pro" is an extended version that also doubles as a wireless repeater for Wi-Fi networks. [46] In November 2020, Amazon announced the recall of 350,000 Ring doorbells in the United States and 8,700 in Canada due to a potential fire risk. [47]

  3. 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 ...

  4. Doorbell - Wikipedia

    en.wikipedia.org/wiki/Doorbell

    Doorbell at the entrance of Chetham's Library, Manchester, England Sound of a two-tone mechanical 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 ...

  5. Range extender - Wikipedia

    en.wikipedia.org/wiki/Range_extender

    The range-extender option costs an additional US$3,850 in the United States, [27] an additional €4,710 (~ US$6,300) in France, [28] and €4,490 (~ US$6,000) in the Netherlands. [29] The range-extender option of the BMW i3 was designed to meet the CARB regulation for an auxiliary power unit (APU) called REx.

  6. 20 useful and innovative gadgets to make life easier for ...

    www.aol.com/lifestyle/products-to-make-life...

    This Ring Video Doorbell comes with 1080p resolution for a crystal-clear view of your front porch. This model has improved motion detection over previous versions, and you can review video footage ...

  7. IEEE 802.11ah - Wikipedia

    en.wikipedia.org/wiki/IEEE_802.11ah

    IEEE 802.11ah is a wireless networking protocol published in 2017 [1] called Wi-Fi HaLow [2] [3] [4] (/ ˈ h eɪ ˌ l oʊ /) as an amendment of the IEEE 802.11-2007 wireless networking standard. It uses 900 MHz license-exempt bands to provide extended-range Wi-Fi networks, compared to conventional Wi-Fi networks operating in the 2.4 GHz, 5 GHz ...