In what year did Bluetooth technology appear?

"Bluetooth" is synonymous with the technical standard of low-power short-distance wireless connection. The word "Bluetooth" comes from the nickname of Harald II, a king who unified Denmark in the 10 century, that is, "Bluetooth". The original supporters of Bluetooth technology are five world-famous computer and communication companies: Ericsson, IBM, Intel, Nokia and Toshiba. 1998 "Bluetooth Special Interest Group -SIG" was established in May, and adopted the strategy of transferring the patented technology to the industry for free, so as to realize its global standardization goal.