Review on COMISO Wireless Portable Speaker - Upgraded IPX7 Waterproof Bluetooth Speaker with 10W Crystal Clear Stereo Sound, 20 Hours Playtime, Built-in Mic and Bluetooth 5.0 for Travel and Outdoor (Black 2.0) by Amanda Smith

It's supposed to run for 20 hours, but starts to beep annoyingly when the battery is 20% charged. That means if you have 4 hours left, it will beep very loudly every minute until you charge it. Why should they do this? I have no idea. This is a complete waste of what 4 hours of music could have been. If you plug it in, you won't be able to use it while it's charging because it'll keep making that annoying loud beeping sound! Dear Comiso, when you build the next model, please don't make it sound when you turn it on or off or when it runs out of power. A tiny light lets us know if it's on, off or charging. Please don't make a sound, or if you make a sound, it must be very quiet. But please don't let it ring when there are 4 hours left. I use it at night when I'm sleeping and I don't want to hear a beep when it needs to be charged. Please update this model and let me know when you do. Thank you and best regards.