Add a usb 30 port connection that inserts flush into a laptop expresscard slot the ecusb3s11 flush mount 1 port usb 30 expresscard lets you add a single usb 30 port connection to your laptop through an expresscard slot the usb 30 adapter uses a unique form factor design that allows it to sit fully in a standard 34mm expresscard slot without sticking out the port sits virtually flush with the sides of the laptop enabling you to leave the card installed even while on the move without f