The USB to serial adaptor provides the connection between USB and the traditional RS-232 serial port. The adapter is designed for connections to Printer， Cell phone， PDA， digital cameras， modems， or ISDN terminal adapters through your USB port. Since the adapter uses no IRQs， it is perfect if you need many serial devices attached to your PC.Features:USB specification 1.1 & 2.0 compliantSupport RS232 serial interface (DB25 or DB9)Support over 1 Mbps data transfer rateSupport remote wake-up and power managmentSupport Windows98 / Win 7 / Win 8 / SE / ME / 2000 / XPSpecification:USB 2.0 to RS232 cable (male 9 pin)Cable Length: (Approx) 94cm / 37 inchPrinter Plug Adapter: DB9 female to DB25 maleEasy to usePackage Includes:1x USB to RS232 (DB9 male) cable adapter1x DB9 female to DB25 male adapter1x Driver CD