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  2. Bluetooth Low Energy beacon - Wikipedia

    en.wikipedia.org/wiki/Bluetooth_low_energy_beacon

    Bluetooth 2.1 improved device pairing speed and security. Bluetooth 3.0 again improved transfer speed up to 24 Mbit/s. In 2010 Bluetooth 4.0 (Low Energy) was released with its main focus being reduced power consumption. Before Bluetooth 4.0 the majority of connections using Bluetooth were two way, both devices listen and talk to each other.

  3. iBeacon - Wikipedia

    en.wikipedia.org/wiki/IBeacon

    Smartphone detecting an iBeacon transmitter. iBeacon is a protocol developed by Apple and introduced at the Apple Worldwide Developers Conference in 2013. [1] Various vendors have since made iBeacon-compatible hardware transmitters – typically called beacons – a class of Bluetooth Low Energy (BLE) devices that broadcast their identifier to nearby portable electronic devices.

  4. Halfords - Wikipedia

    en.wikipedia.org/wiki/Halfords

    Halfords Group PLC is a UK retailer of motoring and cycling products and services. Through Halfords Autocentre , they provide vehicle servicing, MOT , maintenance and repairs in the United Kingdom .

  5. FM transmitter (personal device) - Wikipedia

    en.wikipedia.org/wiki/FM_transmitter_(personal...

    A personal FM transmitter is a low-power FM radio transmitter that broadcasts a signal from a portable audio device (such as an MP3 player or a smartphone) to a standard FM radio. Most of these transmitters plug into the device's headphone jack and then broadcast the signal over an FM broadcast band frequency, so that it can be picked up by any ...

  6. BC-610 - Wikipedia

    en.wikipedia.org/wiki/BC-610

    They made a new version of the HT-4, which was known as the BC-610 transmitter, a part of the SCR-299 mobile communications unit, and production began in 1942. General Dwight Eisenhower credited the SCR-299 in the reorganization of U.S. forces, which led to their victory against the Nazis at Kasserine Pass .

  7. Infinity transmitter - Wikipedia

    en.wikipedia.org/wiki/Infinity_transmitter

    An infinity transmitter (also known as a harmonica bug) is a surveillance device used to covertly monitor conversation in a room through a telephone line. Its name derives from the fact that, by using a telephone line as a transmitter, it can work at an infinite distance, unlike other bugging devices that have only a finite signal range. [ 1 ]