Bluetooth devices communicate with each other by transmitting over low-power radio waves. Generally, Bluetooth transmits along 2.402 GHz and 2.480 GHz. Other devices such as baby monitors, garage-door openers, and some cordless phones use these frequencies as well. Because there are many devices that can use these frequencies, it’s possible that they will interfere with a Bluetooth network. Bluetooth technology avoids this by using spread-spectrum frequency hopping. Though this sounds complex, it really just means that any single device will randomly bounce between 79 individual frequencies to communicate on the Bluetooth network. This ensures that two devices are rarely on the same frequency and that they quickly move on to a new frequency if they are.
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