Love this product.  Great for those long bike rides and plane trips.  Light weight around the neck or clipped on your shirt.  The headphones are weird.  I use the Sony's I got a while ago.  Calls are OK as long as the device is close to your mouth.  Having it hang on your cheats makes the call almost impossible.  Unless you like talking to your belly button.  Sound quality is good.  If you pair this noise canceling headphones is great for planes.  Wish it were a tad louder.  Great battery life and the USB charging port is pretty common.