Bluetooth is a wireless standard and communication protocol. The name bluetooth is based on the ancient old king from Denmark .
The bluetooth class describes the range at which it works. Class 3 is a low power and works only at close range within 1meter. Class 2 uses a little more power and can reach a range of approximately of 10 meters. Lastly there is a Class 1 which is capable of reaching a range of up to 100 meters in direct sight.
The bluetooth version defines the amount of information throughput it can utilize.
Read more about the Bluetooth standard at wikipedia.
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