Okay. Now the establishing the Bluetooth connection. Even that was not easy, because the LED test light either red or green lit, flashing, or nothing did. The right combination had to be found. But this problem was solved. On my iPhone 6 the device is recognized as "CC Remote". I made only once music.
Volume control, pause, fast forward, everything works without problems with the tiny remote that weighs just 16 grams. Advantage: You can slip easily into a small pocket and stuck interfere as outdoor activities at all, so light and flat as it is. Really very good for listening to music while jogging! Even with a presentation on the Mac (for example, PowerPoint) the little black thing is serving. In his hand barely one sees it almost, then it will disappear unnoticed in the inside pocket of the jacket.
There are many other applications of the Mantona Selfy such as remote release for the camera of the iPhone, for your viewing on the iPad etc. will found out what you can personally use it best.
Conclusion: A broad range, good operability. Marginal teething problems when setting up.