Dell Inspiron 15 5584 USB / SD Card Reader IO Circuit Board (part number PYF3X) is a replacement component designed for the Dell Inspiron 15 5584 laptop. This circuit board features integrated USB ports and an SD card reader, providing essential connectivity options for your device. The USB ports allow for easy connection of peripherals such as mice, keyboards, and external storage devices, while the SD card reader enables quick access to data from memory cards, making it ideal for transferring photos, videos, and other files.