Acoustics of Cow2.0 format

At least three of my friends chose a player as a New Year's gift for their children. And at least one of them regretted that he had not stumbled upon these columns earlier, which could have been a fun addition to the present in the coming year of the Bull.

Speaker format: Cow2.0;
Dimensions: 85 * 73 * 58mm;
Weight: 60 grams;
Food: from USB or the built-in battery (lasts for 2 hours) .;
Cost: $ 14.