2X(USB Console Cable RJ45 Cat5 Ethernet To Rs232 DB9 COM Port Serial Female9551
2X(One end is RJ45 crystal net, and the other end is 9-pin female head, which is used for connecting it machines with various PC devices. -232 serial port to RJ45 crystal head cable. Interface: -232 9 (female) to RJ45 (male). ).