Bluetooth

(redirected from Cordless desktop)
Also found in: Dictionary, Medical.

Bluetooth

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

http://bluetooth.com.

Bluetooth

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 (www.bluetooth.com). 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 ?
By pairing the award-winning mouse with a premium keyboard and Bluetooth wireless technology, the Logitech Cordless Desktop MX 5500 Revolution gives people the ability to quickly and intelligently navigate the vast amount of information stored on their PCs and on the Internet.
The Logitech Cordless Desktop MX 5000 Laser was designed to help people easily manage the flow of information from their computer and to enhance the ability to control media on the PC," said Denis Pavillard, Logitech vice president of product marketing for desktops.
The Logitech Cordless Desktop Wave Pro is expected to be available in the U.
The Logitech Cordless Desktop Wave keyboard-and-mouse combination is expected to be available worldwide beginning in late August and will have a suggested retail price of $89.
Both the Logitech Cordless Desktop MX for Bluetooth and the MX900 Bluetooth mouse are compatible with the Windows(R) 2000 and Windows(R) XP operating systems.
New Cordless Desktops Stress Form, Function and Beauty
With one-touch buttons such as Flip 3D and Search Photo Gallery, the Logitech Cordless Desktop MX 3200 Laser mouse-and-keyboard combination enables people using Windows Vista to find and navigate digital content with exceptional speed and comfort.
Silver-based antimicrobial protects Logitech Cordless Desktop MX 3200 Laser against a broad spectrum of bacteria
0 Speakers, QuickCam Ultra Vision Webcam, Cordless Desktop MX3200 Laser
The Logitech Cordless Desktop MX 3200 Laser delivers when efficiency matters most, both for computers running Windows(R) XP and for the upcoming Windows(R) Vista(TM) operating system.
The Logitech Cordless Desktop S 530 Laser for Mac is a stylish upgrade from a standard keyboard and mouse and the perfect addition for products such as the Mac(R) mini, which isn't sold with a mouse or keyboard.
The Logitech Cordless Desktop MX 5000 Laser -- An honoree in the Computer Components category, the Logitech(R) Cordless Desktop(R) MX(TM) 5000 Laser mouse-and-keyboard combination helps people manage the constant flow of information that has become an inherent part of working with computers.