Tying to get the Bluetooth connectivity disconnected, I did reboot multiple times till I could achieve this. Like always right after rebooting I could connect the sound to my Bluetooth device, but soon after shutting the device off and trying to reconnect no sound came to your Bluetooth device. https://www.bluetoothspeaker.top/colorful-cube-waterproof-wireless-stereo-bluetooth-speaker-bluetooth-altavoces-with-led-light/