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  2. Bluetooth Low Energy - Wikipedia

    en.wikipedia.org/wiki/Bluetooth_Low_Energy

    Bluetooth Low Energy (Bluetooth LE, colloquially BLE, formerly marketed as Bluetooth Smart [1]) is a wireless personal area network technology designed and marketed by the Bluetooth Special Interest Group (Bluetooth SIG) [2] aimed at novel applications in the healthcare, fitness, beacons, [3] security, and home entertainment industries. [4]

  3. 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.

  4. Bluetooth - Wikipedia

    en.wikipedia.org/wiki/Bluetooth

    Bluetooth is a short-range wireless technology standard that is used for exchanging data between fixed and mobile devices over short distances and building personal area networks (PANs). In the most widely used mode, transmission power is limited to 2.5 milliwatts, giving it a very short range of up to 10 metres (33 ft).

  5. Wireless speaker - Wikipedia

    en.wikipedia.org/wiki/Wireless_speaker

    Wireless speakers are loudspeakers that receive audio signals using radio frequency (RF) waves rather than over audio cables. The two most popular RF frequencies that support audio transmission to wireless loudspeakers include a variation of WiFi IEEE 802.11, while others depend on Bluetooth to transmit audio data to the receiving speaker.

  6. Radar beacon - Wikipedia

    en.wikipedia.org/wiki/Radar_beacon

    Radar beacon (short: racon) is – according to article 1.103 of the International Telecommunication Union's (ITU) ITU Radio Regulations (RR) [1] – defined as "A transmitter-receiver associated with a fixed navigational mark which, when triggered by a radar, automatically returns a distinctive signal which can appear on the display of the ...

  7. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Model XAE IFF kit, the first radio recognition IFF system in the U.S. Identification, friend or foe (IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but ...

  8. 5.1 surround sound - Wikipedia

    en.wikipedia.org/wiki/5.1_surround_sound

    The left and right surround speakers in the bottom line create the surround sound effect. 5.1 surround sound ("five-point one") is the common name for surround sound audio systems. 5.1 is the most commonly used layout in home theatres. [1] It uses five full bandwidth channels and one low-frequency effects channel (the "point one"). [2]

  9. List of flexible-fuel vehicles by car manufacturer - Wikipedia

    en.wikipedia.org/wiki/List_of_flexible-fuel...

    3.3L Dodge Caravan, Grand Caravan and Caravan Cargo. 2.7L Chrysler Sebring Sedan. 2006. 3.0L Ford Taurus sedan and wagon (2-valve)*. 4.6L Ford Crown Victoria (2-valve, excluding taxi and police units) 5.4L Ford F-150 (3-valve. Available in December 2005) 4.6L Lincoln Town Car (2-valve) 4.6L Mercury Grand Marquis.