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  2. 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 ...

  3. 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 ...

  4. 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 ...

  5. Blink Home - Wikipedia

    en.wikipedia.org/wiki/Blink_Home

    The blink video doorbell is a wirelessly connected smart device that allows video and audio to be viewed via another device. It works similarly to the Ring doorbell, including in its ability to connect to Amazon Alexa and an offering of a "plus" subscription, which allows greater cloud storage capacity and syncing of multiple devices. [9] [10] [11]

  6. Voice warning system - Wikipedia

    en.wikipedia.org/wiki/Voice_warning_system

    Voice warning systems included in cars of the late 1970s to early 1980s, such as the Datsun and Nissan "Z-Car" series, found in the 280ZX and 1984–1988 300ZX (optional in the base model and standard in the Turbo model), and the Datsun Maxima and Nissan Maxima of the early 1980s, were also known as Bitching Betty. The Datsun system issued ...

  7. Kit-Cat Klock - Wikipedia

    en.wikipedia.org/wiki/Kit-Cat_Klock

    The words "Kit-Cat" were added to the clock's face in 1982. The original clocks were AC-powered, but due to scarcity of American-made AC motors, the clock was redesigned for battery power in the late 1980s. [3] The manufacturer estimates that an average of one clock has been sold every three minutes for the last 50 years. [4]

  8. Manual fire alarm activation - Wikipedia

    en.wikipedia.org/wiki/Manual_fire_alarm_activation

    Manual fire alarm activation requires human intervention, as distinct from automatic fire alarm activation such as that provided through the use of heat detectors and smoke detectors. It is, however, possible for call points/pull stations to be used in conjunction with automatic detection as part of the overall fire detection and alarm system .

  9. Accurist - Wikipedia

    en.wikipedia.org/wiki/Accurist

    Accurist became the first company to sponsor the United Kingdom's speaking clock service between 1986 and 2008, [1] and also sponsored a Millennium Countdown clock at the Royal Observatory, Greenwich, which counted down the last 1,000 days before the year 2000 at the historic observatory.