This technology used for wireless headsets is named after a Danish king who united parts of Scandinavia
According to lore... [DOC] [TLE] f(k + 5) - IEEE Entity Web Hosting [PAR] Bluetooth Technology & Applications ... Bluetooth is named after King Harold 
Blatand (or Bluetooth), a 10th Century Danish King who united large parts of 
Scandinavia which are today parts .... Wireless Headsets, Wireless Carkits, 
Cellphones ... Spec 1.1; Headset AG; OPP Client; OPP Server; DUN GW; Fax GW
; Handsfree... [DOC] [TLE] 'So, that's why it's called Bluetooth!'