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.TRENDnet TU-S9 USB to Serial Converter Also known as -USB to Serial Cable Adapter-TRENDnet TU-S9 USB to Serial Converter-Trendnet USB TO SERIAL CONVERTER - TQ-TUS9-TRENDnet USB to Serial Converter-TRENDnet USB to RS-232 Serial Converter