The Inspiron 1520 / 1521 supports SDIO technology. An SDIO (SD Input/Output) card is an interface that extends the functionality of devices with SD card slots. A variety of SDIO cards are being developed, such as camera, Bluetooth®, GPS, and 802.11b devices. Examples of the different possibilities can be found on the SD website, http://www.sdcard.com/usa/TextPage.asp?Page=5