Bluetooth radios operate in the ISM (Industrial, Scientific, and Medical) band, which is a frequency range that is open for use by various electronic devices. Bluetooth devices communicate using a technique called frequency hopping spread spectrum (FHSS), which means that they rapidly switch between multiple frequencies to reduce interference and maintain a strong connection.
Bluetooth radios are typically built into electronic devices, but they can also be added externally using a USB dongle or other type of adapter. The range of a Bluetooth connection can vary depending on the specific device and the environment in which it is being used, but it typically extends up to 10 meters (33 feet).
Bluetooth radios use low power consumption, which makes them suitable for use in battery-powered devices. They also have relatively low data transfer rates compared to other wireless technologies like Wi-Fi, but they are sufficient for transmitting small amounts of data such as audio signals, control commands, and files.
Bluetooth is a versatile technology that has become an integral part of our everyday lives. It allows us to connect various electronic devices wirelessly and conveniently, enabling us to enjoy music, make calls, transfer files, and much more.