I was looking for a Bluetooth headset for sports. Since my Kabelgewurschtel is always walking away totally on my nerves. Also keep Inear listener somehow not really in my unlevel ears also this did to me after a certain time always hurt. Then I stumbled across these headphones at Amazon and I must say I'm thrilled to use the headphones for jogging and cycling and have to say, perfect for my needs. A good sound, long duration and a perfect fit, had only my concerns when I held the headphones for the first time in the hands, but that has rausgesgestellt as absolutely unnecessary. It is important when the paring the knob while pressing the headset until it starts to flash, then the devices are within a few seconds. I use the headphones with my smartphone and can not report on any dropouts, as it was here to read often. For me a crystal clear recommendation. Recreational athletes access.