The Bluetooth.org website, is the official membership site and contains a collection of documents on the unlicensed 2.4 GHz radio spectrum and the 79 frequency signal hops used to reduce interference.

References:
bluetooth.org SIG from 2013

The Bluetooth.org website, is the official membership site and contains a collection of documents on the unlicensed 2.4 GHz radio spectrum and the 79 frequency signal hops used to reduce interference.

References:
bluetooth.org SIG from 2013