Tying to have the Bluetooth connectivity disconnected, I did reboot multiple times until eventually I could do so. Like always immediately after rebooting I could connect the sound to my Bluetooth device, but after shutting the device off and wanting to reconnect no sound came on the Bluetooth device. https://www.bluetoothspeaker.top/china-factory-portable-wireless-speaker-bass-rgb-led-speaker-waterproof/