Review on Kingyou BT001S Wireless Sport Earbuds - Bluetooth Headphones V4.1, Comfort Fit, Heavy Bass, Sweatproof, Magnetic Earphones with Mic for Gym Workout, Running, Jogging - 8 Hours Headset (Black) by Heather Schmidt

[A++] Excellent sound quality [A++] Perfect fit. [A++] More functionality (snapshot) than other headphones [A++] Hard case with hook and snap closure I am really impressed with the sound quality, especially the bass (tested: https https://www.youtube.com/watch?v=bXeuqKUOyTc). The volume can increase sharply (caution). It fits very well, never falls off when I run. You can customize the snapshot button, I use it to activate S-Voice. I have never seen this feature on any other Bluetooth headphones.