The ECUSB3S11 Flush Mount 1-Port USB 3.0 ExpressCard adapter uses a unique form factor design that allows it to sit fully in a standard 34mm laptop ExpressCard slot without sticking out. The port sits virtually flush with the sides of the laptop, becoming an add-on that can be left installed, even while on the move, without fear that it will get snagged or hit against which could cause damage to the card or slot. The USB 3.0 ExpressCard adapter supports data transfer rates up to 5Gbps, and is still backward compatible with USB 2.0 at up to 480Mbps, or USB 1.1/1.0 at up to 12/1.5 Mbps respectively.