Note: Make sure that the other end of your Ethernet cable is connected to a functioning router that has internet connectivity.
Note: The Ethernet Adapter provides both power and internet connectivity to your Chromecast device. Then, plug the Ethernet Adapter’s cable-end into your Chromecast device’s micro-USB port. To attach your Ethernet Adapter, follow these steps:
To set up your Ethernet Adapter for Chromecast, you'll need: If you wish to connect Chromecast Ultra or Chromecast with Google TV without using Wi-Fi, the Ethernet Adapter for Chromecast lets you connect your device directly to your router through your wired Ethernet connection.