The app connects to the text display WiFi network and displays a local website with the song lyrics. Hints: If you have connection problems, first connect the WiFi network of the text display via the Android WiFi settings and then via the app. If asked that there is no Internet access, keep the connection. If the song lyrics fail on Samsung devices, then disable the following setting. Android Settings-> Connections-> WLAN/WiFi -> Intelligent Wi-Fi -> Detect suspicious networks From Android 8