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Bluetooth operations use-
Magnetic technology
Optical technology
Laser technology
Radio technology
ANSWER : 4
Descrption
<p>Bluetooth is a radio technology. </p> <p>Bluetooth operates at frequencies between 2.402 and 2.480 GHz, or 2.400 and 2.4835 GHz including guard bands 2 MHz wide at the bottom end and 3.5 MHz wide at the top.</p> <p>This is in the globally unlicensed (but not unregulated) industrial, scientific and medical (ISM) 2.4 GHz short - range radio frequency band.</p>
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