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 Cisco console configuration line, RJ45 serial port, no turning head. RS-232 serial port to RJ45 crystal head cable. Interface: RS-232 9 (female) to RJ45 (male). This is the control line for routers and switches. It can be used not only on for Cisco equipment, but also on routers and switches of other brands. Because many machines of other brands have the same structural principle as Cisco, generally speaking, if you want to buy 9 holes (232 ports) on one side and RJ45 (network cable port) on the other side, this line is universal! Different batches, products may have color difference The wiring mode is as follows: DB9F------RJ45 2------------3 3------------6 4------------7 5------------4+5 6------------2 7------------8 8------------1 Colour:light blue Material:PVC+Metal Size:Length: about 1.8 meters Package Contents: 1 x USB Console Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.