The headset should I donate Kurzweil while running. Interesting function for folding the handset. Kamen loaded in the delivery and can be used immediately. They have been detected compact without problems from the Sony Xperia Z3. The first test: rather unpleasant I felt the pressure that cause the headphones on your ears. Vemutlich to new, determined softer after some use. The operation is practical: the buttons on the right earpiece are easy to operate. Just what the blue light? Previously I used headphones with lead, has always been satisfied with sound and Passforrm, but regular cable break. Therefore, a wireless version targeted. However, my conclusion: the sound ... No, not good. All adjustments on the player scans - without satisfactory success. A good sound is the most decisive for me! Therefore: I only vote in mediocrity, shame ...