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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.
Bluetooth Car Stereo Audio In-Dash FM Aux Input Receiver SD USB MP3 Radio Player
Bluetooth Car Stereo Audio In-Dash FM Aux Input Receiver SD USB MP3 Radio Player
Price:
17.85 USD
Ends:
Jul 13, 05:41 am
Retekess V115 Portable FM AM SW Radio Digital Speaker MP3 Player Rechargeable US
Retekess V115 Portable FM AM SW Radio Digital Speaker MP3 Player Rechargeable US
Price:
20.35 USD
Ends:
Jul 11, 06:44 am
7
7" Car Radio Apple/Andriod Carplay BT Car Stereo Touch Screen Double 2Din+Camera
Price:
89.99 USD
Ends:
Jul 13, 02:38 am
7
7" Double 2 DIN Car MP5 Player Bluetooth Touch Screen Stereo Radio With Camera
Price:
55.39 USD
Ends:
Jul 25, 01:00 am
7
7" Double Din Car Stereo with Apple Carplay & Android Auto Play MP5 Radio+Camera
Price:
99.95 USD
Ends:
Jul 31, 10:16 pm
V111 Portable FM/AM/SW Radio Stereo Digital Speaker Emergency Alarm Sleep Timer
V111 Portable FM/AM/SW Radio Stereo Digital Speaker Emergency Alarm Sleep Timer
Price:
19.99 USD
Ends:
Jul 02, 07:40 am
7
7" Double 2 DIN Car MP5 Player Bluetooth Touch Screen Stereo Radio With Camera
Price:
49.99 USD
Ends:
Jul 22, 03:03 am
Am/FM Band Radio Supersonic SC-1105
Am/FM Band Radio Supersonic SC-1105
Price:
9.99 USD
Ends:
Jul 04, 07:20 pm
Bluetooth Car Stereo Audio In-Dash FM Aux Input Receiver SD USB MP3 Radio Player
Bluetooth Car Stereo Audio In-Dash FM Aux Input Receiver SD USB MP3 Radio Player
Price:
17.98 USD
Ends:
Jul 24, 07:31 pm
12V FM Car Stereo Radio Bluetooth 1 DIN In Dash Handsfree SD/USB AUX Head Unit
12V FM Car Stereo Radio Bluetooth 1 DIN In Dash Handsfree SD/USB AUX Head Unit
Price:
18.99 USD
Ends:
Jul 16, 07:02 am
2DIN 7''Car FM Radio Stereo Mirror Link Bluetooth USB/TF/AUX/Remote Touch Screen
2DIN 7''Car FM Radio Stereo Mirror Link Bluetooth USB/TF/AUX/Remote Touch Screen
Price:
42.99 USD
Ends:
Jul 15, 01:30 am
Sony Noise-Cancelling True Wireless Bluetooth Earbuds - WF-1000XM4 - Black
Sony Noise-Cancelling True Wireless Bluetooth Earbuds - WF-1000XM4 - Black
Price:
119.99 USD
Ends:
Jul 14, 12:17 pm
2DIN 7
2DIN 7" HD Car Stereo Radio MP5 Player Bluetooth Touch Screen With Rear Camera
Price:
63.99 USD
Ends:
Jul 29, 07:57 am
60W Car Stereo Bluetooth USB MP3 TF AUX Single Din Radio FM Media Player Remote
60W Car Stereo Bluetooth USB MP3 TF AUX Single Din Radio FM Media Player Remote
Price:
29.93 USD
Ends:
Jul 30, 04:04 pm
Klipsch T5 II True Wireless Sport Bluetooth Earphones
Klipsch T5 II True Wireless Sport Bluetooth Earphones
Price:
65.00 USD
Ends:
Jul 28, 06:37 pm
7
7" Double 2 DIN Car MP5 Player Bluetooth Touch Screen Stereo Radio w/ Camera
Price:
55.99 USD
Ends:
Jul 30, 01:37 pm
Car Radio Stereo Dash Install Kit with Harness 2004-2011 Ford Lincoln Mercury
Car Radio Stereo Dash Install Kit with Harness 2004-2011 Ford Lincoln Mercury
Price:
13.95 USD
Ends:
Jul 19, 04:05 pm
For Apple iPhone 13 11 Pro 7 8 Plus X XR XS MAX SE 12 Mini Shockproof Clear Case
For Apple iPhone 13 11 Pro 7 8 Plus X XR XS MAX SE 12 Mini Shockproof Clear Case
Price:
4.45 USD
Ends:
Jul 19, 10:10 pm
9
9" GPS Navi Android 11 2Din Car Stereo Radio Touch Screen WiFi FM RDS USB Camera
Price:
130.02 USD
Ends:
Jul 23, 07:00 pm
Retekess V112 Pocket FM/AM Radio Digital Rechargeable Walkman Sporting Jogging
Retekess V112 Pocket FM/AM Radio Digital Rechargeable Walkman Sporting Jogging
Price:
17.99 USD
Ends:
Jul 03, 07:22 am
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