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Bluetooth is a wireless communication protocol that facilitates the exchange of data over short distances between fixed and mobile devices, creating personal area networks. It enables devices to connect and communicate with each other without the need for physical cables.

There are two important parameters to consider when it comes to Bluetooth devices: class and supported profiles.

The “class” of a Bluetooth device indicates the range over which it can establish a connection. Most mobile devices fall under Class 2, which means they have a range of up to 10 meters. On the other hand, Class 1 devices are less common and can establish connections up to 100 feet away.

Bluetooth “profiles” represent different types of Bluetooth connections and functionalities. The Headset (HSP) and Handsfree (HFP) profiles are among the most common ones. These profiles allow devices to connect wirelessly to headsets or hands-free devices for audio communication.

Other profiles include OBEX (OBject EXchange), which enables the transfer of files, contacts, and events between devices.

The Advanced Audio Distribution Profile (A2DP) adds support for streaming stereo sound wirelessly. Additionally, the Audio/Video Remote Control Profile (AVRCP) allows remote control of playback on connected devices.

Overall, Bluetooth technology offers versatility and convenience by enabling wireless communication and data transfer between devices within close proximity.

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