Groom Industries AC8453 USB to RS-232 D89 Serial Cable, 3-Feet Connect a RS-232 Serial Device Such as a Modem or PDA to a USB 2.0 Port on Your Computer or Laptop Supports over 1Mbps date transfer rate Compliant with Windows 7/Vista/XP/2000/ME/98SE and Mac OS 10.110.6/OSX/Linux Can Support Remote Wake-up and Power Management Supports BUS Power, No External Power Adapter Required