Bluetooth

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A typical Bluetooth headset to connect to a mobile phone

USB adapters such as this one allow some Personal computers to communicate via Bluetooth

Bluetooth is a protocol for Wireless communication. Devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game console can connect to each other, and exchange information. This is done using radio waves. It can be done securely. Originally, Bluetooth was developed to reduce the number of cables needed to connect such devices to a PC. Bluetooth is only used for relatively short distances, like a few metres.

There are different standards. Data rates vary. Currently, they are at 1-3 MBit per second. Typical bluetooth applications are to connect a headset to a mobile phone, or to connect a computer mouse, keyboard or printer.

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