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2. Raymond A. Litke - Wikipedia

   en.wikipedia.org/wiki/Raymond_A._Litke

   Litke’s wireless mike resembled a silver tube with “a microphone at the top, a transmitter in the middle and its battery power supply at the bottom.” [1] It was 6 inches long, 1 inch in diameter, and weighed 7 ounces; the device had a broadcast range of up to a half-mile. Two types of mikes were available: lavalier and hand-held.

3. 10 Best Electronics Gifts Under $100 - AOL

   www.aol.com/10-best-electronics-gifts-under...

   Raycon The Everyday Earbuds (Wireless) Price: $55.99 (originally $79.99) Raycon’s The Everyday Earbuds come in several colors, including matte black, red, rose gold and white.

4. Wireless microphone - Wikipedia

   en.wikipedia.org/wiki/Wireless_microphone

   A wireless microphone, or cordless microphone, is a microphone without a physical cable connecting it directly to the sound recording or amplifying equipment with which it is associated. Also known as a radio microphone , it has a small, battery-powered radio transmitter in the microphone body, which transmits the audio signal from the ...

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. Take 20% Off Raycon Earbuds, Headphones and Speakers ... - AOL

   www.aol.com/entertainment/20-off-raycon-earbuds...

   These Basic Earbuds. The Work Earbuds Classic. Raycon. For everyday wear that’s easy to take in and out, these buds are the perfect pick! See it! Get The Work Earbuds Classic (originally $120 ...

7. Spark-gap transmitter - Wikipedia

   en.wikipedia.org/wiki/Spark-gap_transmitter

   The spark gap is inside the box with the transparent cover at top center. A spark-gap transmitter is an obsolete type of radio transmitter which generates radio waves by means of an electric spark. [1][2] Spark-gap transmitters were the first type of radio transmitter, and were the main type used during the wireless telegraphy or "spark" era ...