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2. Wireless power transfer - Wikipedia

   en.wikipedia.org/wiki/Wireless_power_transfer

   Generic block diagram of a wireless power system. Wireless power transfer (WPT; also wireless energy transmission or WET) is the transmission of electrical energy without wires as a physical link. In a wireless power transmission system, an electrically powered transmitter device generates a time-varying electromagnetic field that transmits ...

3. RF module - Wikipedia

   en.wikipedia.org/wiki/RF_module

   This wireless communication may be accomplished through optical communication or through radio-frequency (RF) communication. For many applications, the medium of choice is RF since it does not require line of sight. RF communications incorporate a transmitter and a receiver. They are of various types and ranges. Some can transmit up to 500 feet.

4. Wireless - Wikipedia

   en.wikipedia.org/wiki/Wireless

   Wireless communication (or just wireless, when the context allows) is the transfer of information (telecommunication) between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common wireless technologies use radio waves. With radio waves, intended distances ...

5. Logitech Unifying receiver - Wikipedia

   en.wikipedia.org/wiki/Logitech_Unifying_receiver

   Logitech Unifying receiver (older) Logitech Unifying receiver (newer) Unifying Logo The Logitech Unifying Receiver is a small dedicated USB wireless receiver, based on the nRF24L-family of RF devices, [1] that allows up to six compatible Logitech human interface devices (such as mice, trackballs, touchpads, and keyboards; headphones are not compatible) to be linked to the same computer using 2 ...

6. Radio receiver - Wikipedia

   en.wikipedia.org/wiki/Radio_receiver

   Wireless (WiFi) modem - an automated short range digital data transmitter and receiver on a portable wireless device that communicates by microwaves with a nearby access point, a router or gateway, connecting the portable device with a local computer network to exchange data with other devices.

7. Qi (standard) - Wikipedia

   en.wikipedia.org/wiki/Qi_(standard)

   In backscatter modulation, the power-receiver coil is loaded, changing the current draw at the power transmitter. These current changes are monitored and demodulated into the information required for the two devices to work together. [2] In 2011, the Wireless Power Consortium began to extend the Qi specification to medium power. [11]