This app is designed to randomly pick Bingo numbers and to display called numbers. You can mirror to an Apple TV, output to a projector via HDMI, share the app window to a group video app, or just show it on from your Mac's display. App can run full-screen or windowed. You can have the app pick random numbers or click and unclick numbers chosen from your personal ball-picking device. The app can optionally say the numbers aloud. Controls are simple.