Many laptops come with the wiring and circuitry to support a Bluetooth card already built in, even if they don't have the card itself installed. To avoid possible compatibility problems, however, you should obtain the Bluetooth module directly from your laptop vendor. On our Dell Inspiron 1525 laptop, we found the Bluetooth connector behind an odd little door in the battery bay.
We merely popped open the door, pulled out the wires, and attached the Bluetooth module to it (photo 1, upper left). On some machines, the module is located near the wireless card slot; on others, it's situated under the keyboard.Reboot your laptop, and then download and install the appropriate driver from your laptop. Fig: Backhham using Bluetooth