Bluetooth is a telecommunications industry specification that describes how mobile devices, computers, and other devices can easily communicate with each other using a short-range wireless connection. The technology got its unusual name in honor of Harald Bluetooth, king of Denmark in the mid-10th century.
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What is Bluetooth tech and how use it?

Bluetooth is a telecommunications industry specification that describes how mobile devices, computers, and other devices can easily communicate with each other using a short-range wireless connection.