SABRENT SBT-USC6K Hi-Speed USB 2.0 to Serial (9-pin) DB-9 RS-232 Adapter Cable - 6 feet (72 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: 72 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 Windows 98SE, ME, 2000, XP, or Vista, MAC OS 8.6 and above