Echo Hub does not have an ethernet port and a compatible USB-C to Power-Over-Ethernet adapter is required for PoE installation. Adapter must support both 5V/2.4A and 9V/3A ratings.
The camera snapshot function currently works only with Ring cameras covered by a Ring subscription. You can still view live feeds from compatible cameras by tapping the device tile or by asking Alexa.
Ring Alarm and all Ring Alarm accessories require a subscription for in-app features and digital notifications, including digital arming / disarming and integration with other Ring, Echo, Alexa, and third party products. Subscription sold separately. View here for pricing and details.
Some features pictured will be added in the coming months via a free, over-the-air update.