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This DB9 to RJ45 extender adapter comes in a 2-piece set with male and female connectors, perfectly converting 9Pin DB9 serial port to standard RJ45 Ethernet port. It allows you to use common network cables to extend serial signal transmission distance, realizing stable serial data and multimedia video signal transmission. Compact and plug-and-play design without extra driver required, perfectly compatible with all DB9 interface RS232 serial devices. Great for industrial control, device debugging, monitoring system and long-distance serial signal extension application.