Bluetooth is a wireless technology for communicating between different devices over short distance. I t provides an ad-hoc approach for enabling various devices to communicate with one another. It was named after the king KING HARALD BLUETOOTH a viking of 10th century who united Denmark and Norway. the main aim of Bluetooth is to share data between different short range devices securely.
TECHNICAL SPECIFICATIONS
It operates in 2.4 GHz ISM band (2400-2483.5). ISM stands for industrial, scientific and medical. the frequencies included in this band are available for free and we does not require any license to use these frequencies. it is based on frequency hopping spread spectrum technique and standard 802.15.1 was devised for Bluetooth. each Bluetooth radio channel has a MHz bandwidth and hops at a rate of 1600 hops per second. transmission is performed in 625 micro slots .the number of bits lost in 1000 Bit transmission is 1 that is one bit is lost when 1000 bits are transmitted. 999 bits are transmitted successfully. Technically this is called bit error rate of 10^-3.
