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SIIG's 4-Port Industrial USB to RS-232 Serial Adapter Cable is designed to easily add four RS232 serial ports to a desktop or notebook computer with an available USB port. This Professional grade USB to serial adapter cable supports up to 12Mb/s USB data transfer rate and 128Kb/s serial port data transfer rate. It features built-in 512 byte FIFO buffers, 15KV DC ESD serial interface protection, software flow control, and is powered by USB bus, no external power adapter is needed. |

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