Bluetooth

A wireless data network (WPAN, Wireless Personal Area Network). Example of application: Connection between a smartphone and loudspeaker or a headset. Two classes exist: Class 1 (a reach of approximately 100 meters) and Class 2 (a reach of approximately 10 meters).

The technique is named after the Danish king Harald Blåtand (in English: Harold Bluetooth). He was known for his ability to establish diplomatic relations, i.e. to create connections.