Profile of Tradetional Bluetooth Technology -- Bluetooth Version 2.1 plus EDR

Profile of Tradetional Bluetooth Technology -- Bluetooth Version 2.1 plus EDR 

Bluetooth inventor is Ericsson company of Sweden, and it already started to develop Bluetooth technology as early as 1994. In February 1998, a Special Interest Group had been established jointly by Ericsson, Nokia, IBM, Toshiba and Intel5 a multinational company for a global short-range wireless communications technologies, it calls Bluetooth.
 
Up to now, Bluetooth technology had been developed V1.1/1.2/2.0/2.1/3.0/4.0 six editions totally. Hereinto, the, version 1.1/1.2 is earlier technology, and they had been phased out basically. While version 2.1 is used widely, transmission rate of Bluetooth 2.1 version can be achieved the 2M bit per sec or more, and devices which adopt 2.1 version can transmit data and voice simultaneously.
 
Bluetooth version 3.0 and 4.0 is an improved version, whose function of transmission speed and distance is substantial increased, especially High Speed technology of Bluetooth version 3.0 and Bluetooth Low Energy of Bluetooth version 4.0 after they hit market.
 
Theoretically, the fastest transmission of Bluetooth technology is reached 24Mbps, but currently it’s transmission rate wasn’t more than 1Mbps under Bluetooth version 2.1 application without EDR technology supporting. In order to achieve large data stream, the introduction of EDR (Enhanced data rate, the enhanced rate of the Bluetooth technology abbreviation) have been introduced, it improves the data transmission rate of the Bluetooth technology to reach 2.1Mbps.
 
In addition to get availability a more stable audio stream transmission and lower power consumption, it also make full use of the bandwidth advantage connect multiple Bluetooth devices at the same time, let Bluetooth devices get satisfactory transmission rate.（More infromation about Bluetooth audio products, please visit http://www.wistao.com/en/index.html) .