1.USB hub Usb hun with 4 ports. The computer has only 2 ports, You can use
the Hub to increase the port for your large usage 2.Bluetooth usb dongle/adapter You can connect your PC to a bluetooth enabled mobile phone with
bluetooth USB adapter. Function: connect to the internet send and receive email browse the web synchronize with a bluetooth enabled PDA hook up to an office network(with bluetooth access point) communicate with other bluetooth devices