USB port adapter which supports all standard serial and parallel devices Compatible with USB 2.0 and USB 1.1 devices \"Plug & Play\" Connectors: USB A Male to 9 Way D Male & 25 Way D Female Powered from USB Bus with no external power supply required Cable length: 0.7m Compatible with Windows ME/2000/XP/Vista & 7 (32 bit only), Mac OS 8.6 This USB to serial and parallel converter cable allows a USB ready computer to connect to 9-Way serial RS-232 and parallel peripheral devices simultaneously using a single USB port.