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  2. Walkie-talkie - Wikipedia

    en.wikipedia.org/wiki/Walkie-talkie

    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 Motorola. First used for infantry, similar designs were ...

  3. SCR-300 - Wikipedia

    en.wikipedia.org/wiki/SCR-300

    Motorola SCR-300 circa 1940. The SCR-300 was a portable radio transceiver used by US Signal Corps in World War II. This backpack -mounted unit was the first radio to be nicknamed a "walkie talkie". [1]

  4. Antique radio - Wikipedia

    en.wikipedia.org/wiki/Antique_radio

    Homemade two tube radio from 1958. 1930s style homemade one-tube regenerative radio. The idea of radio as entertainment took off in 1920, with the opening of the first stations established specifically for broadcast to the public such as KDKA in Pittsburgh and WWJ in Detroit. More stations opened in cities across North America in the following ...

  5. Bluetooth - Wikipedia

    en.wikipedia.org/wiki/Bluetooth

    Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft).

  6. Wireless device radiation and health - Wikipedia

    en.wikipedia.org/wiki/Wireless_device_radiation...

    The antennas contained in mobile phones, including smartphones, emit radiofrequency (RF) radiation ( non-ionizing "radio waves" such as microwaves ); the parts of the head or body nearest to the antenna can absorb this energy and convert it to heat. Since at least the 1990s, scientists have researched whether the now-ubiquitous radiation ...

  7. Waveband Communications - Wikipedia

    en.wikipedia.org/wiki/Waveband_Communications

    Waveband Communications manufactures over 500 two-way radio communication products. The company product offerings include two-way radio batteries, antennas, battery packs, belt clips, chargers, ear inserts, tips, and plugs, headsets, portable radio adapters, receive only earpieces and remote speaker microphones. Conferences

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