Bluetooth technology operates in the unlicensed industrial,
scientific and medical (ISM) band at 2.4 to 2.485 GHz, using a
spread spectrum, frequency hopping.
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ISM 2000?
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The industrial, scientific and medical (ISM) radio bands
comprise 868 MHz in Europe,
915 MHz in the USA and Australia, and 2.4 GHz in most
jurisdictions worldwide.