Although impedance connectors are unique, there are multiple suppliers that make similar models. One key selling point for this impedance connector is the back-lock structure that the customer should be familiar with, as it applies to all of the FPC connector lineup. This structure allows for both top and bottom contacts, improved FPC retention, and assists in easy assembly. Another unique benefit this connector has is that there are no pin assignments. Rather than designating certain pins as ground terminals, all of the pins can be used for signal, which allows engineers to choose which pins they wish to ground for differential signal, thereby offering a higher degree of design freedom.