Bluetooth

Bluetooth is a short-range wireless technology for exchanging data among nearby devices over radio waves. It supports both direct connections and small networks, with variants designed for different power and data-rate needs.

Frequency-hopping spread spectrum: A radio technique that rapidly changes transmission frequency to reduce interference and resist interception. Bluetooth changes channels rapidly within the 2.4 GHz band to share crowded airwaves.
Industrial, scientific and medical radio band: A set of radio-frequency bands allocated worldwide for industrial, scientific, and medical equipment. Bluetooth operates in the globally available 2.4 GHz ISM band.
Bluetooth audio: The transmission and control of sound between Bluetooth devices, such as phones, headsets, and speakers. Audio streaming is a prominent use of Bluetooth and relies on compatible audio profiles.
Wi-Fi: A family of wireless networking standards used primarily for local-area network and internet access. Wi-Fi generally offers higher throughput and network reach than personal Bluetooth links.
Bluetooth pairing: A procedure that establishes trust and shared security information between Bluetooth devices. Pairing lets devices authenticate one another and establish protected connections.
Piconet: A small Bluetooth network organized around a device coordinating communication with connected devices. Classic Bluetooth links historically organize devices into a coordinator-led piconet.
Wireless keyboard: A keyboard that sends keystrokes to a computer or other host without a physical data cable. Bluetooth keyboards use low-bandwidth wireless links to connect peripherals to hosts.
Near-field communication: A short-range wireless technology for communication between devices brought within a few centimeters. NFC works at much shorter distances and often initiates exchanges that Bluetooth then sustains.
Bluetooth Low Energy: A Bluetooth radio mode designed for low-power communication, often using brief data exchanges. This mode reduces energy use for sensors and devices that transmit intermittently.
Bluetooth address: An identifier used to distinguish a Bluetooth device or interface during communication. Devices use Bluetooth addresses during discovery and connection, though privacy features can rotate them.

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