Tying to get the Bluetooth connectivity disconnected, I did reboot multiple times right until I could do so. Like always right after rebooting I could connect the sound to my Bluetooth device, but after shutting the device off and trying to reconnect no sound arrived on the Bluetooth device. https://www.bluetoothspeaker.top/bt-speaker-wireless-portable-wireless-bt-v5-0-stereo-patent-bt-speaker/