The DYNEX DX-CRDRD Internal USB Multi Card Reader/Writer is a versatile and efficient device that supports various memory cards such as MMC, SDHC, xD, Memory Stick Pro Duo, and Micro SD. With a capacity to hold more than 20 memory cards, this card reader is perfect for those who need to quickly and easily transfer data from multiple devices. Its internal connectivity ensures a seamless connection to laptops and desktop computers, making it a convenient accessory for any user looking to streamline their data transfer process.it does nothave USB port, but connects to internet USB header.