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(protocol, standard)
A specification for short-range radio links between mobile computers, mobile phones, digital cameras, and other portable devices.


The standard wireless personal area network (WPAN) for short-range transmission of digital audio and data. Using radio waves, Bluetooth transmits through walls and other non-metal barriers. Although the term is synonymous with cellphone headsets and in-vehicle, hands-free telephony, Bluetooth is also used for wireless speakers, keyboards, mice, game controllers, smartwatches and more (for category details, see Bluetooth profiles).

Spread Spectrum Transmission
Using frequency hopping spread spectrum (FHSS), Bluetooth 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.

Bluetooth Versions (see table below)
Bluetooth 1.2 (Basic Data Rate) was the first widely used Bluetooth technology. Bluetooth 2.0 + EDR (Enhanced Data Rate) improved speed and interference handling. Bluetooth 3.0 + HS (High Speed) establishes the connection via Bluetooth but transfers data over Wi-Fi.

Version 4 added Bluetooth Low Energy (BLE). Branded as "Bluetooth Smart," BLE uses only a quarter of the power at 1 Mbps, and devices can transmit for years on watch batteries (see Bluetooth LE).

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 DATA RATES          Max. Data            Rate Version   (Mbps)

 1.2         1    "Bluetooth Classic"
 2.0 + EDR   3    "Bluetooth Classic"
 2.1 + EDR   3    "Bluetooth Classic"

 3.0 + HS   24    (over Wi-Fi)

 4.0         3
 4.0 + BLE   1    (Bluetooth LE)

 4.1   Improvements (see  Bluetooth 4.1)

 4.2 + BLE   1+   Designed for IoT
                    (see  Bluetooth 4.2)

 BLUETOOTH POWER CLASSES         Max.   Approx.        Power   Range Class   (mW)  (meters)

  1      100     100
  2      2.5      10
  3      1         1

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.

The Bluetooth Logo
The stylized "B" displayed on this cellphone means it has been synchronized with a Bluetooth device.
References in periodicals archive ?
The type and amount of equipment: The switch core 1 Extended warranty to switch 1, the License expanding functionality 2 module to the switch core 2, insert 550m 4, insert 300m 20, insert 10km 6, Module HP light SFP + 4, insert 10km 2, insert 220m 6, Warranty 4 36m Cisco 2960, service setup and installation 1 disk array with equipment 1 server memory to 16GB 16, FC card to the server 3, the adapter 10GB Server 3 Hub PoE 2, Stand Rack 1, RJ Plugs 45 1 Monitors 60 cable to the printer 20, USB extension cable 20, keyboard 40, mouse 40, Headphones 20, amplifier blue tooth 3, wireless adapters 4, AP 5, LTO3 tape 15, PoE power supply 1, the projector 1, Memory DDR3 RAM for computers 25, 10.
These technologies include among other things, miniaturized printed circuit boards, (PCB's), cutting edge wireless communication systems, long life miniature batteries, blue tooth technologies and "smart phone" interface.
The colour screen controls the media system (USB/iPod/iPhone) plus Blue tooth phone and audio streaming, but doesn't come with satellite navigation standard, which is an option.
Stick another one on the car's dash, makes the phone automatically switch to Blue tooth mode for driving and send a text to person's loved one letting them know they are on their way.
Hookitup via Blue tooth and read texts, control tunes, check Twitter and more on its 1.
Pubs and businesses have been displaying posters, and housing the equipment necessary for blue tooth technology, which has been sending text messages to those travelling past the crime scene.
They can also take advantage of a 12-year warranty against rust-perforation plus get a Blue Tooth connection absolutely free.
New technology features on the Nissan Armada include Nissan Navigation and DVD entertainment system, intelligent key, rear-view camera, Bose audio, I-pod Connectivity and blue tooth.
Blu is responsible for a series of points across the capital which allow people with Blue tooth enabled mobile phones to access information about local events and shops.
0 mega pixel camera, a music streamer, a Blue tooth handset and even a bottle opener.
Known as "Teen Buzz" it is spread from phone to phone via text message and blue tooth technology.