Bluetooth
•Bluetooth is a technology that provides short-range radio links between personal computers, handheld devices, wireless phones, headsets, printers, and other electronic devices.
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•For devices without chipsets that enable them to receive Bluetooth radio waves you can purchase an adapter to enable use with other Bluetooth devices.
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•Bluetooth doesn’t need an access point for communication; devices communicate with each other automatically. 
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•Bluetooth isn’t really “owned” by any specific manufacturer or group.