The Raspberry Pi4 4Gig Media Player is ideal for digital signage. Robust and solid-state the player is reliable and capable with dual micro HDMI ports and a very low power requirement. The operating system is Linux and it has built-in WiFi, Bluetooth and audio capabilities.
Having 4GB of RAM offers you a little more breathing room. Ideal for Digital Signage screens that need to handle live data feeds and Kiosk applications.