SABRENT SBT-USC1K (CBL-USB-CS1B) Hi-Speed USB 2.0 to Serial (9-pin) DB-9 RS-232 Adapter Cable - 1 foot, 12 inches BLACK, with male thumbscrews The SABRENT USB 2.0 to DB9 Serial Adapter connects your USB port to the Serial RS-232 port. Designed for connections to Cellular phones, PDAs, digital cameras, modems, or ISDN terminal adapters through your USB port with up to 1 Mbps data transfer rate. Since the adapter uses no IRQs, it is perfect if you need many serial devices attached to your PC. Converts a standard 9-pin serial port to USB Provides a 96 byte buffer for each upstream and downstream data transfer USB full speed communication and Bus Powered Complies with USB Specification v2.0 and 1.1(0) & USB CDC v1.1 Connectors: One USB A Male to DB9 Male (serial 9 pin) Cable length: 12 inches Supports automatic handshake mode Up to 1Mbps data transfer rate Supports remote wake-up and power management 96 byte buffer each for upstream and downstream data flow No IRQs, no IRQ conflicts Female connectors on each side of the Serial port to connect to thumbscrews Windows 98SE, ME, 2000, XP, or Vista, MAC OS 8.6 and above