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  2. Wireless speaker - Wikipedia

    en.wikipedia.org/wiki/Wireless_speaker

    The receiver/speaker unit generally contains an amplifier to boost the audio signal to the loudspeaker; it is powered either by batteries or by an AC electric outlet. The signal frequency range used by wireless speakers is generally the same as that used by cordless telephones – 900 MHz. The RF signal can traverse walls and floors/ceilings.

  3. Realistic (brand) - Wikipedia

    en.wikipedia.org/wiki/Realistic_(brand)

    1969. Defunct. 2000 (Returned in 2016) Fate. Renamed Radio Shack brands. Products. Record players, Audio receivers, Cassette decks, Ham radios, Speakers, Headphones. Realistic is a brand produced by RadioShack, a division of Tandy Corporation, to market audio and video products for home use. The brand name was phased out in the mid 1990s and ...

  4. RadioShack - Wikipedia

    en.wikipedia.org/wiki/RadioShack

    RadioShack (formerly written as Radio Shack) is an American electronics retailer which was established in 1921 as an amateur radio mail-order business. Its parent company, Radio Shack Corporation , was purchased by Tandy Corporation in 1962, shifting its focus from radio equipment to hobbyist electronic components.

  5. The best wireless headphones for seniors - AOL

    www.aol.com/lifestyle/best-wireless-headphones...

    Quick Overview. More options. Sony WH-1000XM5 Noise-Cancelling Headphones. Best headphones overall. $259 at Groupon. Soundcore Q30 Hybrid Active Noise-Cancelling Headphones. Best budget headphones ...

  6. 33-centimeter band - Wikipedia

    en.wikipedia.org/wiki/33-centimeter_band

    The 33-centimeter or 900 MHz band is a portion of the UHF radio spectrum internationally allocated to amateur radio on a secondary basis. It ranges from 902 to 928 MHz and is unique to ITU Region 2 (Americas). [1] It is primarily used for very local communications as opposed to bands lower in frequency. However, very high antennas with high ...

  7. Walkie-talkie - Wikipedia

    en.wikipedia.org/wiki/Walkie-talkie

    Assorted two-way FRS and GMRS walkie talkies with hand mic. A walkie-talkie, more formally known as a handheld transceiver ( HT ), is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski and engineering teams at ...