Screens
3 LED screens. Ca. 55 inc. 
Stands for the screens. 

Media Players
3 Bright Sign media players. Programed to sync files and send to 3screens through 3 HDMI cables.
or
1 mac mini (2018), program a software that can syncs the 3 files. Sent to 3 screens and through 2 USB C and 1 HDMI cable.