2 port eSATA CardBus Adapter Gives you 2 eSATA ports from your laptop With a maximum data transfer rate of 150MBps, it makes it easier to do data off loads StarTech.com's Lifetime Warranty Free Lifetime Technical Support Supports two high-speed eSATA channels for SATAI/II device connections Two external Serial ATA (eSATA) ports Data transfer rates up to 150MBps Compatible with 32-bit CardBus