The TRENDnet TU-S9 USB to Serial Converter connects any RS-232 serial device to your laptop or desktop computer using a USB port. This nine-pin USB to serial converter supports a data transfer rate of up to 500Kbps and can also detect USB suspend condition. It is compatible with multiple operating systems. You can easily install the USB to RS-232 serial converter with its universal plug and play capability. It supports BUS power and needs no external power adapter.