The CDLSB-901 is a USB serial converter operate as a connection between one USB port and a 9 way RS232 serial device. The CDLSB-901 is for connecting serial devices even when a serial port is not available within a PC or laptop.Specification: Compliant with USB HID Specification. USB Bus Powered. USB Rev 1.1 compliant. Supports RS-232 serial interface. Over 1Mbps transfer rate. Supports remote wake-up and power management. Supports Windows 98SE/2000/ME/XP/Vista/Windows 7 32 & 64-bit