Etekcity Premium High Speed USB 2.0 to Serial RS-232 DB-9 Converter - Supports Windows 8, 7, Vista, XP, 2000, 98, Linux and Mac/USB TO SERIAL ADAPTER (USB2-VE487) with FTDI Chipset USB-2920 USB 2.0 to Serial DB9 Adapter Supports Windows 98SE, 2000, XP, Vista, 7, 8 and Mac OS V8.6 or Higher Supports remote wake-up and power management No power adapter required, draws power from USB bus