Bluetooth is a wireless technology standard for exchanging data between devices over short range using radio waves. It creates personal area networks that allow several devices to communicate directly without cables. Devices such as phones, headsets, speakers, keyboards and mice can pair and share audio, files or control commands. Each connection is established through an authorisation process that ensures only approved devices can link. By operating in the 2.4 gigahertz band, Bluetooth supports multiple simultaneous connections in close proximity without major interference.