Add audio and networking flexibility to your speaker with this white Sonos Combo Adapter for Era 100/300. When this adapter is plugged into the USB-C port of your Era 100 or Era 300 speaker, you gain a female RJ45 Ethernet port and a 3.5mm female port. The 3.5mm port allows you to connect wired audio devices, such as a turntable, to the speaker, and the Ethernet port gives you the option of connecting the speaker to your home network via a wired LAN connection rather than over Wi-Fi. Please note that both a 3.5mm auxiliary and Ethernet cable are not included with the Combo Adapter.