To be marketed as a Bluetooth device, it must be qualified to standards defined by the SIG.

Originally Gaussian frequency-shift keying ( GFSK ) modulation was the only modulation scheme available ; subsequently, since the introduction of Bluetooth 2. 0 + EDR, π / 4-DQPSK and 8DPSK modulation may also be used between compatible devices.

These manufacturers must be either Associate or Promoter members of ( see below ) the Bluetooth SIG before they are granted early access to the Bluetooth specifications, but published Bluetooth specifications are available online via the Bluetooth SIG Website.

A Bluetooth PAN is also called a piconet ( combination of the prefix " pico ," meaning very small or one trillionth, and network ), and is composed of up to 8 active devices in a master-slave relationship ( a very large number of devices can be connected in " parked " mode ).

Bluetooth can be used to connect keyboards, headsets, GPS receivers, and other nearby accessories.

Using a phone that supports 3G and Bluetooth 2. 0, multiple Bluetooth-capable laptops can be connected to the Internet.

In 961, their uncle King Harald Bluetooth of Denmark traveled to Norway and declared Harald Greycloak to be his vassal king in Norway.

This can be done using the MAC ( Machine Access Control ) addresses from Bluetooth devices, or using the RFID serial numbers from Electronic Toll Collection ( ETC ) transponders ( also called " toll tags ").

Bluetooth detection uses similar techniques to other traffic measurement technology, and will be as accurate as these other systems.

Depending on the manufacturer of the eCall system, it could be mobile phone based ( Bluetooth connection to an in-vehicle interface ), an integrated eCall device, or a functionality of a broader system like navigation, Telematics device, or tolling device.

* Cordless computer peripherals: the cordless mouse is a common example ; keyboards and printers can also be linked to a computer via wireless using technology such as Wireless USB or Bluetooth

The technology defined by the ZigBee specification is intended to be simpler and less expensive than other WPANs, such as Bluetooth.

Because ZigBee nodes can go from sleep to active mode in 30 ms or less, the latency can be low and devices can be responsive, particularly compared to Bluetooth wake-up delays, which are typically around three seconds.

ZigBee-style networks began to be conceived around 1998, when many installers realized that both Wi-Fi and Bluetooth were going to be unsuitable for many applications.

Sharp introduced a very different device from the clamshells in the form of the SL-6000 in early 2004 ; the SL-6000L ( Wi-Fi only, no Bluetooth ) was sold in North America, the last and only device since the 5xxx series to be officially sold outside Japan.

Unfortunately, the C1000 cannot be upgraded to fit an internal microdrive because vital components are missing, but one intrepid Zaurus owner used the space to fit internal Bluetooth and Wi-Fi modules using the USB host facility.

He also unsuccessfully pressed for Harald Bluetooth, the first Christian king of Denmark, to be sanctified.

Other products being released fit a new category called bluedildonics, which allow a sex toy to be controlled remotely via a Bluetooth connection.