this adapter provide a passive interface from PS\/2 to usb . this do not work for many device . the manufacture of the keyboard or mouse must have design it specifically work with this kind of adapter . if you device do not work with this passive adapter , you should use the active adapter , Cable , usb to -lrb- 2 -rrb- PS\/2 Splitter USB-2400 instead . see  Cable , usb to -lrb- 2 -rrb- PS\/2 Splitter