Tying to find the Bluetooth connectivity disconnected, I did reboot multiple times right until I could do so. Like always just after rebooting I could connect the sound to my Bluetooth device, but immediately after shutting the device off and seeking to reconnect no sound arrived to the Bluetooth https://www.bluetoothspeaker.top/dj-pro-audio-amplified-loud-speakers-with-subwoofer-and-bluetooth-party-speaker/