I have the deleyCon Sports Pro ordered me, because I was tired of the hassle of tangling during exercise (cycling and running).
The "Sports Nano" sit very well and the sound is really excellent for a Bluetooth In-Ear Headphones.
Unfortunately, the Bluetooth connection between the headphones and the phone is (tested with Sony Xperia Z3 and Samsung Note 4) a large disaster and unacceptable in practice. As soon as I put the phone in your pocket the reception is interrupted, there is only fragmentary music. I take the phone out of his pocket and holding it in his hand, so the connection is re glass as clear.
Thus, the headset is not for me to use. I'm going to test it during the weekend again with a proper sports trousers. However, should the result be the same, so the "sports Nano" is unfortunately back.
The one star is available for the right fit and the sound when he sometimes sounds.