"Add a slim flush mounting eSATA port to a laptop through ExpressCard This flush mount 1-Port eSATA ExpressCard adapter uses a unique ""slim"" form factor design that allows it to sit fully in a standard 34mm laptop ExpressCard slot, without sticking out. The adapter eSATA port sits flush with the sides of the laptop, creating a seamless add-on that can be left installed even while on the move, without fear that the card or slot will be damaged due to impact or snagging. The flush mount eSATA ExpressCard lets you experience the high performance capability of eSATA storage with support for data transfer rates up to 3Gbps, as well as port multiplier capability with command-based switching for connecting multiple external hard drives to a host PC or Mac notebook through a single eSATA connection. The ECESATA1 eSATA ExpressCard uses a native PCI Express single chipset (non-bridged), to deliver enhanced compatibility, reliability and performance for your external storage needs. Backed by a StarTech.com 2-year warranty and free lifetime technical support." " * Slim ExpressCard design recesses completely into the slot, leaving no part outside the slot, and allowing the adapter to be left in the ExpressCard slot during transporting * Port Multiplier support allows multiple external drives to work over a single eSATA connection * Fast data transfer rates with SATA II and support for large capacity hard drives over 137GB"