Bluetooth is a specification for short distance wireless communication between two devices. Hub (sometimes referred to as a concentrator) refers to a networking component which acts as a convergence point of a Network allowing the transfer of data packets. Bluetooth USB Dongle/Adapter - USB Bluetooth Adapter works for short-range wireless data connectivity between computers and Bluetooth enabled devices. (eg. Keyboard, mouse, cellular phone, LAN, Printer and PDA). Bluetooth Wireless Optical Mouse - A Bluetooth Mouse is used to input convenience to your computer. Bluetooth Headset - Blue Tooth Headset is a most desirable gadget to connect with your Bluetooth mobile phone cordlessly