Converts Straight Cable to Null Modem. | Low profile to save space! Quickly change the gender, or join two cables together | Each changer is molded and fully shielded, preventing any unwanted EMI/RFI interference caused from office equipment | Small and simple design provide convenience for carrying and storing, easy to use and intall | what you ger: 2 x D-Sub 9-Pin Male to D-Sub 9-Pin Male. 2 x D-Sub 9-Pin Female to D-Sub 9-Pin Female. Connector type: d sub