Bluetooth's frequency band.
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UNII
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GSM
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ISM
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VHF
Reveal answer
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C
Correct answer
Explanation
Bluetooth operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, which is globally available for unlicensed wireless communication. This band is used by WiFi, Zigbee, and other wireless technologies. UNII is used by WiFi at 5 GHz, GSM is a cellular standard, and VHF is for broadcast radio.
AI explanation
Bluetooth operates in the unlicensed 2.4 GHz ISM (Industrial, Scientific, and Medical) band, which is why it can be used worldwide without needing a specific spectrum license, unlike cellular (GSM) or licensed bands used by other radio services.