Each eero has two Ethernet ports, a USB 2.0 port, a power port, and a reset button.
One of the Ethernet ports is used to connect your gateway eero to the Internet via your modem. The other Ethernet port can be used to hardwire another device (such as a Sonos player) directly to your network. If you’re using more than one eero, you can also use the Ethernet ports to wire eeros together. It doesn’t matter which Ethernet port you use to connect to your modem since eeros configure themselves automatically.
The USB port is strictly used for diagnostic purposes at this time. Other devices (e.g. speakers and external hard drives) shouldn’t be plugged into this port.
We don’t recommend using the reset button unless you’re following specific troubleshooting suggestions from an eero WiFi expert.