The earbuds don't look big, but they cover the ears quite well. What I liked most about them was the soundproofing from the outside world. When you put on these headphones, all household noises disappear. They even surpassed Creative Aurvana Gold in this quality. But JBL is also great sound, and that's okay here too … 
You feel very comfortable in these headphones. There is no excessive pressure on the head and even after watching a two-hour movie, the ears do not look like after a bath. The material of the ear cushions does not cause discomfort due to pressure and at the same time provides good passive noise isolation. 
They brought me a white model for the test, which had already gone through several tests. But there were no traces of use on the surface of the case, although we all know how well white plastic gets dirty. And after a week of operation at home, nothing was added. The body material here is such that it does not attract dirt. 
Headphones are controlled using traditional physical buttons. You can understand them without reading the instructions in a couple of minutes. The multifunction key makes it easy to switch between two incoming calls. The only oddity is that the buttons are not brought to the front, but back. That is, switching is done with the thumb. Convenient, but unusual. 
JBL Everest 300 connects to the sound source on Bluetooth 4.1 and due to the reduced power consumption, these headphones beat all records in autonomy. 20 hours of work on one charge. The Everest 300 speakers are great for any genre of music. The frequency range is 10 – 22,000 more than the average person needs. No wireless artifacts or noise were found. JBL engineers tried to make good sound, and for communication on the phone, a microphone with a special echo cancellation system is built into the headphones. 
Usually, I don't pay attention to boxes. But Everest has a very stylish package. 
JBL Everest 300 is a very worthy model among wireless headsets. Of all the advantages of these headphones, I would especially highlight the wearing comfort and excellent sound. Detailed information about the product can be found on the manufacturer's website ru.jbl.com.
