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(protocol, standard)
A specification for short-range radio links between mobile computers, mobile phones, digital cameras, and other portable devices.
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The standard wireless network technology for short-range transmission of digital audio and data from the Bluetooth Special Interest Group (SIG). The trademarked name and logo signify genuine Bluetooth technology (for more information, visit

Using radio waves, Bluetooth transmits through walls and other non-metal barriers. Although the term is synonymous with cellphone headsets and hands-free telephony in vehicles, Bluetooth is also used for wireless speakers, keyboards, mice, game controllers, smartwatches and more (for the different categories, see Bluetooth profiles). Constantly enhanced, see Bluetooth versions for version details.

Spread Spectrum Frequency Hopping
Bluetooth is a wireless personal area network (WPAN) that continuously changes its frequency. It randomly changes to one of 79 channels 1,600 times per second in the same unlicensed 2.4 GHz band as Wi-Fi. See spread spectrum.

Scandinavian Origins
Named after ancient King Harald Blatan of Denmark, Sweden-based Ericsson developed Bluetooth and co-founded the governing body in 1998 ( Bluetooth is also an IEEE personal area network (PAN) standard (see 802.15). Supporting point-to-point and multipoint architectures (see piconet), there are billions of Bluetooth devices in use. See Bluetooth glossary.

Bluetooth = Headset
Because they are were so ubiquitous, "Bluetooth" initially became synonymous with "headset." However, Bluetooth connects many other devices.

Game Controllers
This "gamepad" from Sony uses Bluetooth to communicate with the PlayStation3 game console. See video game controller. (Image courtesy of Sony Corporation.)

Blue Teeth!!
This Oral-B toothbrush sends elapsed time to the app in the user's smartphone via Bluetooth to monitor brushing time and history.

Bluetooth Logos
The stylized "B" displayed on a modern smartphone (left) or earlier cellphone (right) means that Bluetooth has been turned on in the device.
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-- 512MB of PC2700 333 MHz DDR SDRAM, expandable up to 1.25GB; -- a slot-load 8X SuperDrive (DVD+/-RW/CD-RW) optical drive; -- an 80GB Ultra ATA/100 (5400 rpm) hard drive with Sudden Motion Sensor; -- AirPort Extreme 54 Mbps 802.11g WiFi fast wireless networking and internal Bluetooth 2.0+EDR; -- DVI, VGA, S-video and composite video support; -- two USB 2.0 ports and FireWire 400; -- audio line in and headphone out; and -- a scrolling TrackPad.
Integrated 1.3-megapixel webcam with Magic-i visual eEffects and webcam companion 2, plus built-in microphone, 10/100 Ethernet, 802.11b/g wi-fi support, and Bluetooth 2.0+EDR all support Internet connection on the fly.
Wipro-NewLogic, the semiconductor IP business unit of Wipro Technologies (NYSE:WIT), announced on Wednesday (4 July) the release of its Bluetooth 2.0+EDR baseband RTL and software stack.
Combined with the Wipro-NewLogic Bluetooth 2.0+EDR radio IP, it offers customers a range of system configurations and can be integrated into any application, host or baseband chips, in the mobile, automotive and consumer markets, the company informed.
It also features a DVI-out port, Dual Link support, Gigabit Ethernet port, two USB 2.0 ports, FireWire 800 port, FireWire 400 port, AirPort Extreme 802.11n wireless networking and Bluetooth 2.0+EDR and ExpressCard/34 expansion card slot.
In addition, every new MacBook Pro includes built-in 10/100/1000 BASE-T Gigabit Ethernet for high-speed networking, built-in AirPort Extreme and Bluetooth 2.0+EDR (Enhanced Data Rate), a FireWire 800 and a FireWire 400 port, analog and optical digital audio input and output ports, an ExpressCard/34 expansion card slot, and a DVI video output.
Mac Pro also includes dual Gigabit Ethernet ports, optical digital input and output, analog audio input and output, and optional built-in support for AirPort Extreme and Bluetooth 2.0+EDR. Every Mac Pro comes standard with the NVIDIA GeForce 7300 GT with 256MB of video memory, with the ATI Radeon X1900 XT and the NVIDIA Quadro FX 4500, both with 512MB of video memory, available as options, the company claims.