Bluetooth technology is a short range wireless communication technology to replace the cables connecting electronic devices, allowing a person to have a phone conversation via a headset .

Jaap Haartsen, who invented Bluetooth while working at Ericsson in the 1990s, has been nominated as a finalist by the European Patent Office in the industry category for its European Inventor Award. A bluetooth device  works by using radio waves instead of wires or cables to connect with cell phone, smart phone or computer. Bluetooth is mainly used for linking computers and electronic devices in ad-hoc way over very short distance, often for only brief or occasional communication using relatively small amounts of data. It’s relatively secure, uses little power, connects automatically and in theory presents little or no health risk.Since the advent of version 1.0 in 1999, Bluetooth has seen many revisions in its technology. When the first version of bluetooth came out, it paved the way for the wireless head phones , speakers and game controllers that we use today. Bluetooth 1.0 was far slower than what we have now.

The versions and specifications are given below in short.

• Bluetooth v1.0 to v1.08 – It is Mandatory bluetooth hardware device and address.
• Bluetooth v1.1 – It is IEEE standard 802.15.1-2002 .
• Bluetooth v1.2 – It has capacity of Faster connection.
• Bluetooth v2.0+EDR –It has Enhanced data rate.
• Bluetooth v2.1 –It is Secured for simple pairing.
• Bluetooth v3.0 – It is capable of High speed data transfer.
• Bluetooth v4.0 –It is low energy consumption recently used in apple I-phone 4s. The latest version in bluetooth technology is 5.0.

There are verious types has bluetooth technology. Such as

• Bluetooth headsets.
• Stereo headset.
• In-car Bluetooth headset.
• Bluetooth-equipped printer.
• Bluetooth enables webcam.
• Bluetooth keyboard.
• Bluetooth GPS device.

Bluetooth technology has some advantages and disadvantges. Such as-

• It avoids interferance from other wireless devices.
• It has lower power consumption.
• It is easily upgradeable.
• It has range better than infrared communication.
• The bluetooth is used for voice and data transfer.

                                Although most mobile devices and many Pcs today support bluetooth , the technology comes with a few disadvantages, including slow data speeds, poor data security and shortened battery life.

Bluetooth technology adoption is expected to be widespread throughout the computer and telecommunications industry. Implementation of the Bluetooth technology is expected to grow the market for parsonal mobile devices and indirectly increase airtime usage for wireless data, over the long term.