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. Compliant with USB HID SpecificationWinChipHead CH340 chipsetUSB Bus poweredUSB Rev 1.1 compliantSupports RS-232 serial interfaceOver 1Mbps transfer rateSupports remote wake-up and power managementSupports Windows 98SE/2000/ME/XP/Vista/Windows 7 32 & 64-bitDriverless installation with Windows XP, Vista & Win 71.2m