Tying to get the Bluetooth connectivity disconnected, I did reboot multiple times until finally I could accomplish that. Like always following rebooting I could connect the sound to my Bluetooth device, but after shutting the device off and trying to reconnect no sound arrived for the Bluetooth device. The https://www.bluetoothspeaker.top/bt-speakers-with-hd-audio-and-enhanced-bass-built-in-speaker-phone/