Cables Unlimited USB-2920 USB2.0 to RS232 Serial Adapter (Black) Supports Windows 98SE, 2000, XP, Vista, 7 and Mac OS V8.6 or Higher Supports remote wake-up and power management Supports data transfer rates up to 1Mbps. No power adapter required, draws power from USB bus Perfect for use with modems, PDA's, cell phones, digital cameras and more