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Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 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 2W CTCSS/DCS VOX Walkie Talkies for Family(2pcs)
Retevis RT22 UHF Two Way Radios 2W CTCSS/DCS VOX Walkie Talkies for Family(2pcs)
Price:
27.40 USD
Ends:
Jul 30, 10:03 am
Baofeng UV-5R UHF VHF Dual Band Two Way Ham Radio Walkie Talkie
Baofeng UV-5R UHF VHF Dual Band Two Way Ham Radio Walkie Talkie
Price:
26.97 USD
Ends:
Jul 07, 10:23 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:
109.99 USD
Ends:
Jul 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:
36.99 USD
Ends:
Jul 22, 10:38 am
Cobra Model 29 LX Certified Refurbished Full Featured Professional CB Radio
Cobra Model 29 LX Certified Refurbished Full Featured Professional CB Radio
Price:
99.99 USD
Ends:
Jul 20, 12:20 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:
45.59 USD
Ends:
Jul 12, 02:51 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:
Jul 23, 03:05 pm
Cobra Electronics 29 LTD Certified Refurbished Professional CB Radio
Cobra Electronics 29 LTD Certified Refurbished Professional CB Radio
Price:
89.99 USD
Ends:
Jul 20, 12:19 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:
Aug 02, 06:16 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:
44.99 USD
Ends:
Jul 13, 09:49 am
ABBREE AR-518 Air Band Full Band Wireless Copy frequency Handheld Two Way Radio
ABBREE AR-518 Air Band Full Band Wireless Copy frequency Handheld Two Way Radio
Price:
46.99 USD
Ends:
Jul 22, 01:22 am
2 Pack Baofeng BF-88A Walkie Talkie 2 Two Way Radio Handheld Long Range FRS
2 Pack Baofeng BF-88A Walkie Talkie 2 Two Way Radio Handheld Long Range FRS
Price:
27.98 USD
Ends:
Jul 16, 08:11 am
Baofeng UV-5R VHF UHF Dual-Band Ham 5W Portable Two-way Radio Walkie Talkie
Baofeng UV-5R VHF UHF Dual-Band Ham 5W Portable Two-way Radio Walkie Talkie
Price:
25.60 USD
Ends:
Jul 05, 05:57 am
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:
Jul 19, 09:55 pm
2 pcs Baofeng BF-88A  Walkie Talkie Two Way Radio 1500mAh Set with Flashlight
2 pcs Baofeng BF-88A Walkie Talkie Two Way Radio 1500mAh Set with Flashlight
Price:
24.89 USD
Ends:
Jul 20, 03:16 am
Retevis H777Plus FRS Two Way Radios Long Range 2W CTCSS/DCS Walkie Talkies(10X)
Retevis H777Plus FRS Two Way Radios Long Range 2W CTCSS/DCS Walkie Talkies(10X)
Price:
119.99 USD
Ends:
Jul 30, 10:06 am
Motorola Talkabout T100 Two-Way Radios walkie talkies, 16mile, 2 pack, Neon Blue
Motorola Talkabout T100 Two-Way Radios walkie talkies, 16mile, 2 pack, Neon Blue
Price:
34.99 USD
Ends:
Jul 29, 05:29 pm
Cobra Electronics 25 LTD Certified Refurbished Professional CB Radio
Cobra Electronics 25 LTD Certified Refurbished Professional CB Radio
Price:
59.99 USD
Ends:
Jul 15, 06:59 pm
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:
Aug 02, 08:36 pm
7 Bids
5 Motorola xpr6550 2 way radios and 2 chargers used UHF and antennas
5 Motorola xpr6550 2 way radios and 2 chargers used UHF and antennas
Price:
100.00 USD
Ends:
Jul 10, 08:37 pm
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