Bluetooth Mice

One of the RF technologies that wireless mice commonly use isBluetooth. Bluetooth technology wirelessly connects peripherals such as printers, headsets,keyboardsand mice to Bluetooth-enabled devices such ascomputersandpersonal digital assistants(PDAs). Because a Bluetooth receiver can accommodate multiple Bluetooth peripherals at one time, Bluetooth is also known as apersonal area network(PAN). Bluetooth devices have a range of about 33 feet (10 meters).

Bluetooth operates in the 2.4 GHz range using RF technology. It avoids interference among multiple Bluetooth peripherals through a technique called spread-spectrumfrequency hopping. WiFi devices such as 802.11b/g wireless networks also operate in the 2.4 GHz range, as do somecordless telephonescordless telephones andmicrowaveovens. Version 1.2 of Bluetooth provides adaptive frequency hopping (AFH), which is an enhanced frequency-hopping technology designed to avoid interference with other 2.4 GHz communications.

Why is it called Bluetooth?

Harald Bluetooth was king of Denmark in the late 900s. He managed to unite Denmark and part of Norway into a single kingdom then introduced Christianity into Denmark. He left a large monument, the Jelling rune stone, in memory of his parents. He was killed in 986 during a battle with his son, Svend Forkbeard. Choosing this name for the standard indicates how important companies from the Baltic region (nations including Denmark, Sweden, Norway and Finland) are to the communications industry, even if it says little about the way the technology works.