Features usb 30 superspeed host controller expresscard allows two usb 30 devices to be connected to a notebook downward compatible with usb 20 high speed and usb 11 external interface usb 30 up to 5 gbits port for optionally connecting a power supply with a dc of up to 5v all connections can be used simultaneously specifications mainboard connection expresscard34 output current up to 900 maport feature product features number of usb ports internal 0 pc interface expresscard usb standard