- The standard of sound. Everything has been taken to a very advanced degree. Charger. Despite the fact that I had been using them frequently, I did not charge the headphones for the first time until 20 days after I had purchased them. Convenient form. Earplugs were never comfortable for me, and they frequently became dislodged from my ears. Yet, the earphones fit wonderfully and remain securely in the ears during the workout.
- Microphone. Views differ, but approximately two thirds of those I communicated with using the headset stated that there was an echo or additional noise. You are still able to communicate, but the other person may find it difficult to keep up with the conversation at times. Unusual pairing with the Bluetooth device. More on this can be found in the comments.