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2. Ultra high frequency - Wikipedia

   en.wikipedia.org/wiki/Ultra_high_frequency

   UHF wavelengths are short enough that efficient transmitting antennas are small enough to mount on handheld and mobile devices, so these frequencies are used for two-way land mobile radio systems, such as walkie-talkies, two-way radios in vehicles, and for portable wireless devices; cordless phones and cell phones.

3. Family Radio Service - Wikipedia

   en.wikipedia.org/wiki/Family_Radio_Service

   The Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized frequencies around 462 and 467 MHz in the ultra high frequency (UHF) band.

4. Walkie-talkie - Wikipedia

   en.wikipedia.org/wiki/Walkie-talkie

   Designs for personal walkie-talkies are in any case tightly regulated, generally requiring non-removable antennas (with a few exceptions such as CB radio and the United States MURS allocation) and forbidding modified radios. Most personal walkie-talkies sold are designed to operate in UHF allocations, and are designed to be very compact, with ...

5. Two-way radio - Wikipedia

   en.wikipedia.org/wiki/Two-way_radio

   Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...

6. Personal radio service - Wikipedia

   en.wikipedia.org/wiki/Personal_radio_service

   Japan has several services in the VHF and UHF bands: Japan's Specified Low Power Radio (特定小電力無線局, tokutei shōdenryoku musenkyoku) or SLPR service covers a variety of low-power uses, and does not require registration. Walkie-talkies are limited to 10 mW in the 420, 421, and 422 MHz bands.

7. Very high frequency - Wikipedia

   en.wikipedia.org/wiki/Very_high_frequency

   So the VHF and UHF wavelengths are used for two-way radios in vehicles, aircraft, and handheld transceivers and walkie-talkies. Portable radios usually use whips or rubber ducky antennas , while base stations usually use larger fiberglass whips or collinear arrays of vertical dipoles.