Technology Bluetooth has received the name in honour of the Danish king of X th century Harold II. Blatan. In transfer with Danish Blatan — the Dark blue Tooth, accordingly in an English variant — Blue Tooth. This king has become famous for the ability to find common language with princes-vassals and in due time has united Denmark and Norway. In 1000, his name was offered as the name for new technology by the Swedish company Ericsson, which has acted as the initiator of project Bluetooth.
Bluetooth — the technology of the wireless data transmission, allowing to connect with each other any devices in which there is built in microchip Bluetooth. Most actively, the technology is applied to connection to mobile phones of every possible external device: wireless set hands free, wireless the modem, receivers of satellite navigation, and actually for connection to the personal computer.
From obvious advantages Bluetooth-set, it is possible to note considerably smaller degree of their radiation in comparison with mobile phones and, of course, possibility to conduct a phone conversation, not holding it in a hand. Various Bluetooth-devices incorporate with each other automatically as soon as appear within reach, that is necessity for cables and drivers disappears.
Unlike technology of the infrared communication IrDA providing communication only between two devices, Bluetooth can communicate with several (to seven) devices Bluetooth: one device thus will be active, and the others are in an expectation mode. Radio waves, which are used in Bluetooth, can pass through walls and nonmetallic barriers and incorporate to Bluetooth-devices on distance from 10 to 100 metres depending on the device specification. For the specification of 1 radius makes 1.1 class of action to 100 metres, for a class 2 (applied in mobile phones) — to 10 - m.
All over the world Bluetooth works on not licensed and uniform frequency of industrial, scientific and medical application ISM of 2, 45 GHz spatial borders for use Bluetooth do not exist. As there is no also a problem of incompatibility of Bluetooth-devices of various manufacturers as the technology is standardized. Therefore, no obstacles for distribution Bluetooth are present.
Adjustment Bluetooth-sets.
The majority of models the Bluetooth-set presented now in the market, practically equally is functional. In much their functionality is defined by features of phone with which it is used set.
Everyone Bluetooth the-device has the unique address and a name, therefore after registration procedure incorporates only to phone registered with it. For adjustment it is necessary to charge to set, to include both devices (phone and to set) and to place nearby from each other. After start of procedure of search sets on phone display, its specification will be highlighted and the password (usually it is required to enter the password 0000) will be requested. After its introduction of set, it is considered registered for your phone.

The note. Radio emission Bluetooth can create hindrances for various technical devices, therefore in hospitals and in places where hearing aids are used and cardio stimulator it is necessary to disconnect it. If you use cardio stimulators before connection Bluetooth-sets preliminary consult with the doctor.

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