Once you take the remote and tv box out of the box connect the power cable and the HDMI Cable if you do not have WIFI then you will also need to plug in an Ethernet cable.
Once you plug everything in to the wall plug the HDMI cable into the TV
Once everything is connected turn on the tv and put it in the HDMI mode. For my TV it says near the connector what mode it is. Mine is HDMI 2.
I also recommend signing into your APPLE ID.
Once you are set up you can do multiple things. You can watch Netflix, YouTube, and various other channels. You can also watch any movies or tv shows from iTunes. (Keep in mind you may need to update your device.)
You can also airplay on your iOS device or computers. If you have a Mac then it will show the computer screen (if you meet the requirements) if it is a windows then it will only do iTunes.
You can mirror your device. To do so on an iPad or iPhone or even iPod if capable slide the control center up and select Air Play.
From there you will see a screen that asks you where you want to send the video/song. If you have multiple apple
TV or air play devices you will have to select which one you want.