Bluetooth
Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances using short-wavelength UHF radio waves.
Bluetooth is a short-range wireless communication technology that uses radio waves to transmit information, much like WiFi. But where that wireless standard operates semi-permanent networks and can do so over a vast distance, Bluetooth is typically more limited and personal than that.
Bluetooth works by sending information over ultra-high-frequency radio waves . It works between the 2.4 and 2.485 GHz frequencies, much like many Wi-Fi devices do, which can create problems with interference when both technologies are running simultaneously.
Where Wi-Fi operates asymmetrically Bluetooth typically works symmetrically, with one Bluetooth device connecting to another. Up to eight devices can be connected on a single personal area network.