KonZert Sound Sytem - Simple Live Sound Setup

https://www.youtube.com/watch?v=su5HzEwLMoM

KonZert by Zamony Ventures Corporation

https://www.youtube.com/watch?v=VkaTWnba_PY

Battery Operated 220v AC Bluetooth Speakers

https://invol.co/cl5oyyf

18650 Lithium Ion Rechargeable Battery / 3.7v True Rated / Used Laptop Battery Branded Cells