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Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver accepts radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device.
Retevis RT22 UHF Two way radios Long Range CTCSS/DCS 2W VOX Walkie Talkies(2pcs)
Retevis RT22 UHF Two way radios Long Range CTCSS/DCS 2W VOX Walkie Talkies(2pcs)
Price:
29.99 USD
Ends:
May 30, 10:03 am
BaoFeng UV-5R V/UHF Dual Band Two-way Walkie-Talkie 136-174/400-520MHz Ham Radio
BaoFeng UV-5R V/UHF Dual Band Two-way Walkie-Talkie 136-174/400-520MHz Ham Radio
Price:
26.99 USD
Ends:
Jun 02, 06:16 am
US 2x Baofeng UV-5R Dual-Band V/UHF FM Transceiver Ham Two-way Radio Scanner
US 2x Baofeng UV-5R Dual-Band V/UHF FM Transceiver Ham Two-way Radio Scanner
Price:
47.99 USD
Ends:
Jun 12, 02:51 am
Motorola Talkabout T801 Two-Way Radio, 35 Mile, 2 Pack, Bluetooth, Black & Green
Motorola Talkabout T801 Two-Way Radio, 35 Mile, 2 Pack, Bluetooth, Black & Green
Price:
74.99 USD
Ends:
Jun 12, 08:37 pm
2 Pack Set Long Range Walkie Talkie 50 Mile Two Way Radio Charge Waterproof Best
2 Pack Set Long Range Walkie Talkie 50 Mile Two Way Radio Charge Waterproof Best
Price:
30.99 USD
Ends:
Jun 22, 10:38 am
Cobra Electronics 29 LTD Chrome Certified Refurbished Professional CB Radio
Cobra Electronics 29 LTD Chrome Certified Refurbished Professional CB Radio
Price:
99.99 USD
Ends:
Jun 08, 07:17 pm
Baofeng UV-5R VHF UHF Dual-Band FM Ham 5W Portable Two-way Radio Walkie Talkie
Baofeng UV-5R VHF UHF Dual-Band FM Ham 5W Portable Two-way Radio Walkie Talkie
Price:
26.98 USD
Ends:
Jun 05, 05:57 am
Cobra Floating Waterproof Walkie-Talkie 2-Way Radio Up to 37 Mile
Cobra Floating Waterproof Walkie-Talkie 2-Way Radio Up to 37 Mile
Price:
25.99 USD
Ends:
May 30, 10:18 pm
USA Baofeng UV-5R + Plus V/UHF Handheld Ham Two-way Walkie Talkie Transceiver HT
USA Baofeng UV-5R + Plus V/UHF Handheld Ham Two-way Walkie Talkie Transceiver HT
Price:
26.49 USD
Ends:
May 30, 08:18 am
Baofeng UV-5R Walkie Talkies Two-way Radio Dual Band VHF UHF Long Range+Hand Mic
Baofeng UV-5R Walkie Talkies Two-way Radio Dual Band VHF UHF Long Range+Hand Mic
Price:
36.10 USD
Ends:
May 23, 03:05 pm
5 Bids
Kenwood NX-5200 VHF portable DMR NXDN P25
Kenwood NX-5200 VHF portable DMR NXDN P25
Price:
255.00 USD
Ends:
May 27, 02:31 am
2 X BAOFENG BF-888S UHF 400-470 MHz 5W CTCSS Two-way Walkie-Talkie Radio
2 X BAOFENG BF-888S UHF 400-470 MHz 5W CTCSS Two-way Walkie-Talkie Radio
Price:
29.99 USD
Ends:
Jun 08, 07:41 am
BAOFENG UV-9R Plus 18W VHF UHF Walkie Talkie Dual Band Handheld Two Way Radio
BAOFENG UV-9R Plus 18W VHF UHF Walkie Talkie Dual Band Handheld Two Way Radio
Price:
29.99 USD
Ends:
Jun 13, 09:49 am
BaoFeng UV-82 Dual Band Two-Way Radio 136-174MHz VHF & 400-520MHz UHF (Black)
BaoFeng UV-82 Dual Band Two-Way Radio 136-174MHz VHF & 400-520MHz UHF (Black)
Price:
28.49 USD
Ends:
Jun 02, 08:36 pm
Retevis H777Plus Two Way Radios Long Range FRS CTCSS/DCS 2W Walkie Talkies(10X)
Retevis H777Plus Two Way Radios Long Range FRS CTCSS/DCS 2W Walkie Talkies(10X)
Price:
119.99 USD
Ends:
May 30, 10:06 am
MOTOROLA XTS5000 700 800 MHz P25 Digital Police Fire EMS RADIO H18UCH9PW7AN XTS
MOTOROLA XTS5000 700 800 MHz P25 Digital Police Fire EMS RADIO H18UCH9PW7AN XTS
Price:
249.00 USD
Ends:
May 30, 04:38 am
2 Bids
POFUNG VHF/UHF 128CH
POFUNG VHF/UHF 128CH
Price:
15.00 USD
Ends:
May 22, 10:49 pm
2 Pack Long Range Walkie Talkie 50 Mile Two Way Radio Charge Waterproof US
2 Pack Long Range Walkie Talkie 50 Mile Two Way Radio Charge Waterproof US
Price:
26.99 USD
Ends:
May 23, 04:00 pm
Cobra 23-Mile 2-Way Radios Walkie Talkies, 2-Pack (CXT385)
Cobra 23-Mile 2-Way Radios Walkie Talkies, 2-Pack (CXT385)
Price:
17.99 USD
Ends:
Jun 19, 09:55 pm
Motorola XTS2500 UHF Covert Military Two Way Radio 380-470MHz P25 AES FPP LI-Ion
Motorola XTS2500 UHF Covert Military Two Way Radio 380-470MHz P25 AES FPP LI-Ion
Price:
289.00 USD
Ends:
Jun 19, 09:59 am
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