Technically, Bluetooth is a specification for the use of low-power radio communications to wirelessly link phones, computers and other network devices over short distances. The name “Bluetooth” is borrowed from Harald Bluetooth, who was a king in Denmark more than 1,000 years ago. Bluetooth technology was designed primarily to support simple wireless networking of personal consumer devices and peripherals, including cell phones, PDAs, and wireless headsets.
First generation transmits data up to 1 Mbps and utilizes the 2.4 Ghz band. Bluetooth technology is currently at a 2.0 version.