You can either purchase a Screenly Player or, if you are a more technically-minded user,
you can build your own Screenly Player. The Screenly Player is a small, physical media player
that renders content to your digital sign. You will need one Screenly Player for each screen.
To purchase a Screenly Player, you can purchase the device from the PiShop US store or, instead,
from the Pi Supply UK store. The Screenly Player is sold within the Screenly Box 0, which is a single box that contains a Screenly Player, a power supply cord, and a HDMI cable.
If you wish to build your own Screenly Player, you will need a Raspberry Pi 3 Model B or Raspberry Pi 3 Model B+ minicomputer. You will then need to flash the Screenly disk image to a microSD card. Read more about the self-build process here or watch this instructional video.