Its good quality obviously lacking bass.
Enough to listen to music in a room / bathroom / living room (25m2). Beyond or to use in the evening / in a noisy environment you have to go on the larger version (not tested) or Bose Soundlink mini (changing budget but also power and sound quality).
In my case serves its purpose ie to replace the speaker on my phone / tablet / computer cheaply.
Practice the power take along when we change room without moving the camera.
Really small fit into a coat pocket in issue.
Not tested autonomy.