The USB to 2-port-Serial Converter, is a low-cost, high-performance device. It operates as a bridge and provides single and easy connection between one USB port and two-serial ports. Each serial port can be independently configured into various synchronous and asynchronous interfaces. Users can have the option to operate multiple devices at the same time. This product is designed to accommodate those peripherals with serial-port, like cellular phone, digital camera, modem, mouse, PDA, GPS, ISDN terminal adapter, etc. Data buffers for upstream and downstream on each port Compliant with remote wake-up and power management Frees your PC RS-232-port for other uses. Full compliance with the USB Specification 1.1 Compatible with: Windows98/SE/ME/2000/XP/Vista/7. Mac OS 8.6/OS-9/OS-X, Linux FTDI chipset **Download the latest driver including Win7