As mentioned above, good speaker for its price! The battery is decent, the LEDs are nice! The sound is loud, it doesn't "lose" much at maximum volume but don't expect crystal clear sound. No bass either.

I bought it purely to play songs for my child via USB, mainly for lullabies and bedtime.

At first, it didn't recognize the USB but when I formatted it in a specific format, it worked fine.

The only major downside for the use I intended is that when you turn on the speaker, it says a poem "Bluetooth mode on" (or something similar, I don't remember exactly) at the MAXIMUM volume of the speaker, which startles both the living and the dead.

Very good speaker for its price.
The sound is not the best, but decent. For this price, I don't expect someone to have crazy demands. The volume is quite loud.
It is lightweight, easy to carry, connects with BT, charges relatively quickly.
Overall, very satisfied for its category.
I recommend it!