The Dell D520 laptop comes with an internal card that allows the computer to connect wirelessly to the Internet. This Wi-Fi card has Bluetooth capability as well. That means you can enable Bluetooth on your computer and connect a headset or other device to the unit. Turn on Bluetooth right from the main desktop screen.
Click on the "Start" tab (the Windows-logo button on the lower-left-hand corner of the screen).
Click "Control Panel" from the list of options that appears in the drop-down window.
Click "Network and Internet Connections" in the list of options that appears.
Click "Bluetooth Devices."
Click the "Enable Bluetooth" option in the window.