Sound and battery 1 star.
Bass is present and you can tell it’s there, but it is dull.
Mid frequencies are present but dull.
High frequencies are present and don’t tire you out like the 30,000 kHz and 40,000 kHz do; you can hear them, but they are dull too.
Guitar and heavy drum sound are also terrible, dull, everything. I didn’t buy them for myself, but I’m testing them for an acquaintance of mine until he comes to give them to him. You should know that the phrase "You get what you pay for" applies 100% of the time, some or most times, maybe not always, but there are times when it fits. These headphones, guys, are extremely terrible; whatever music I played from Spotify, they played it very badly. Note that I’m talking about Spotify Premium, not YouTube or SoundCloud. When years ago I said that if you can or try to give a decent amount of money for headphones and home speakers, I was 100% right, and once again I’m vindicated. I’m not talking about thousands of euros, but I compare them with the Marshall Major IV and V. The battery seems to be very bad, and while I’m commenting at a slow pace I’m listening to music at the same time. From 50% onward, after very few songs at full volume, it went to 20%. When it reaches 20%, it makes a call sound like when you call someone (tuut tuut) to audibly notify you that the battery is low. After a few songs it went to 10%, and again after a few songs they turned off. So the battery, after not even an hour of use, is very bad. To buy headphones priced at 25 euros, I really have to be in need and truly unable to give even one euro more. The whole sound of the headphones, meaning across the entire frequency range, is very muffled and very dull. It’s like listening through small portable speakers that you’ve put inside a backpack and play music like that, and that’s how they sound. Anyone who can afford 25 euros and cannot spend more will necessarily buy them, but if you can spend more money, spend more. With Klarna you can buy a pair of Bluetooth over-ear headphones for 150 euros in three installments and you’ll have headphones with a very respectable and balanced sound, not a muffled, suffocated, dull sound. To say all this, I know something; I have experience with 3 different Bluetooth headphones and 3 pairs of speakers that focus on sound and not on everything else. Have you ever heard your voice underwater in the sea? If yes, that’s roughly how the DEVIA Kintone series wireless headset V2 sounds. Another very bad thing about them is that when you connect them to a charger, they immediately stop playing and the Bluetooth connection is lost; the phone doesn’t recognize them at all while they are charging, whereas with the Marshall Major IV and V you can listen to music while charging. I mean, they can’t play music while charging? Not even that? As we said, cheap things have many limitations, but not to be this bad.