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 Maria Hanson

Let's get straight to the point. Pros: Long Playtime - I watch TV shows on my Amazon Fire HD 10 daily and on Saturday shows (when this speaker arrived) I charged it fully and watched for 5 hours. Then on Sunday I watched about 10 hours and on Monday I'm still using them with charging. Playback from microSD card. This feature doesn't seem to be advertised in the description, but the speaker has a microSD card slot that you can use to play songs. I tried it and it worked. Probably not usable, but good to have. Cons: - Decent sound but not the best - Less bass (not to my liking) - Needs to be louder.