Glossary

Bluetooth

A wireless technology that enables seamless wireless short-range communications of data and voice between both mobile and stationary devices such as mobile phones, personal computers, printers, electronic organizers, etc. It was first developed by the Scandinavian company Ericsson in 1994 for use in their wireless earpieces and is named after King Harald Blatan (Bluetooth) of Denmark. The Bluetooth technology utilizes the globally available 2.4 GHz frequency band. Due to hopping spread spectrum technique that changes its signal 1600 times per second, interference from other devices doesn't stop the transmission, although its speed may be slowed down.

There are three Bluetooth power classes – class 1 (not very common; allows transmission distance of up to 100 meters); class 2 (the most common; allows transmission distance of 10 meters) and class 3 (very rare; allows transmission distance of about 10 cm with a maximum of 1 meter).

Bluetooth technology is available in three versions, including 1.1 (allowing transmission data speeds of up to 1 Mbps in the); 1.2 (allows devices to be discovered more reliably, have better audio quality and better reliability under interference conditions) and 2.0 (allowing transmission data speeds of up to 3 Mbps with lower power consumption).