Bluetooth is a wireless technology standard used for exchanging data between devices over short distances. It uses radio waves to transmit data between devices that are within range of each other. Bluetooth technology is commonly used for connecting devices such as smartphones, headphones, speakers, and other electronic devices. The technology is often used for wireless audio streaming, file transfer, and internet connectivity. Bluetooth is named after the Viking King Harald Bluetooth, who united Denmark and Norway in the 10th century.