This technology used for wireless headsets is named after a Danish king who united parts of Scandinavia
| Wonderopolis [PAR] Instead, he was talking to someone via a wireless headset that you hadn't noticed 
... Bluetooth is a global wireless communication technology originally invented by 
... set of devices, the technology was named after Danish King Harald Bltand, ... 
united warring parts of Norway, Sweden, and Denmark in the 10th century.