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2. 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.

3. Smart home hub - Wikipedia

   en.wikipedia.org/wiki/Smart_home_hub

   Some smart home hubs support a wider selection of components, while others are more specialized for controlling products within certain product groups or using certain wireless technologies (e.g. Wi-Fi, Bluetooth, Z-Wave, and/or Zigbee). A smart speaker with a virtual assistant can often be used for speech input to a smart home hub.

4. Zigbee - Wikipedia

   en.wikipedia.org/wiki/Zigbee

   Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and other low-power low-bandwidth needs, designed for small scale projects which need wireless connection.

5. How to use Alexa Care Hub to help monitor and contact older ...

   www.aol.com/news/alexa-care-hub-help-monitor...

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6. Google Nest (smart speakers) - Wikipedia

   en.wikipedia.org/wiki/Google_Nest_(smart_speakers)

   A larger version of the Google Nest Hub, called the Google Nest Hub Max, was announced on May 7, 2019. It features a 10-inch (1280 x 800) display, integrated camera (which can be used for face recognition, Google Duo video calls, and as a security camera), and larger speakers with a rear-facing subwoofer.

7. Traveling-wave tube - Wikipedia

   en.wikipedia.org/wiki/Traveling-wave_tube

   A TWTA consists of a traveling-wave tube coupled with its protection circuits (as in klystron) and regulated power supply electronic power conditioner (EPC), which may be supplied and integrated by a different manufacturer. The main difference between most power supplies and those for vacuum tubes is that efficient vacuum tubes have depressed ...