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SIIG's 4-Port Industrial USB to RS-232 Serial Adapter Hub is a professional grade USB plug-and-play adapter hub designed to add four high speed RS-232 serial ports to desktop or notebook computers. This professional grade USB to serial adapter hub supports USB 2.0 data transfer rate up to 480Mb/s and serial port data transfer rate up to 921.6Kb/s. It features built-in 512 byte FIFO buffer, software flow control, 15KV DC ESD serial interface protection, and is powered by USB bus for low power consumption, no external power adapter is needed.
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