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  2. Door phone - Wikipedia

    en.wikipedia.org/wiki/Door_phone

    Door phone plates consist of a matrix of buttons. each of them drive a buzzer located in a unit inside each apartment building. Each apartment building contains a button that can activate the electric strike. There are several installation systems, the most traditional being a system known as 4 + 1, named for the types of wiring that it ...

  3. Z-Wave - Wikipedia

    en.wikipedia.org/wiki/Z-Wave

    Z-Wave is a wireless communications protocol used primarily for residential and commercial building automation. It is a mesh network using low-energy radio waves to communicate from device to device, [2] allowing for wireless control of smart home devices, such as smart lights, security systems, thermostats, sensors, smart door locks, and garage door openers.

  4. Wireless intercom - Wikipedia

    en.wikipedia.org/wiki/Wireless_intercom

    Another reason is the increased portability of a wireless system. With battery-powered radio frequency wireless intercom units, a person can carry a station as they walk around. One of the challenges of a wireless system is the possibility of interference. Radio frequency wireless systems may get interference from other wireless devices.

  5. Intercom - Wikipedia

    en.wikipedia.org/wiki/Intercom

    A butler uses an intercom on behalf of a lady. An intercom, also called an intercommunication device, intercommunicator, or interphone, is a stand-alone voice communications system for use within a building, small collection of buildings or portably within a small coverage area, which functions independently of the public telephone network. [1]

  6. Doorbell - Wikipedia

    en.wikipedia.org/wiki/Doorbell

    Old door bell pull knobs in Edinburgh, United Kingdom.It is unclear whether bells were rung by wire and pulleys, or by electrical connection. In most wired systems, a button on the outside next to the door, located around the height of the doorknob, activates a signaling device (usually a chime, bell, or buzzer) inside the building.

  7. 25 of the best Walmart sales of the week: Apple gadgets ... - AOL

    www.aol.com/lifestyle/the-best-walmart-sales-of...

    More than 10,000 reviews on Walmart are obsessed with this stain-fighting tool. "After months of my kids trashing my car and spilling smoothies, milk, lemonade, etc., the backseats in my car ...

  8. Paid biweekly? Here's when you could get an 'extra' paycheck ...

    www.aol.com/paid-biweekly-heres-could-extra...

    People looking to save money for a big trip or financial investment may want to make plans around an "extra" paycheck in their pocket.. Employees who get paid on a biweekly basis (every other week ...

  9. HomeLink Wireless Control System - Wikipedia

    en.wikipedia.org/wiki/HomeLink_Wireless_Control...

    The system typically features three buttons, most often found on the driver-side visor or on the overhead console, which can be programmed via a training sequence to replace existing remote controls. It is compatible with most RF-controlled garage door openers, as well as home automation systems such as those based on the X10 protocol.

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