Those who deal with the issue of headphones first has to decide whether he wants to have an "in ear", "on ear" or "Over Ear". All systems have inherent advantages and disadvantages in terms of portability, or the sound quality. The Headphones Philips SHL 5505 YB is an on ear product. The sound is really excellent, the stereo effect is clearly expressed. There are no disturbing noises. The comfort is excellent for an on ear product. The ear pads are soft and are good to the ear. The strap is adjustable enough for me. The appearance of the headset is elegant, the colors are consistent. The cable makes its linen texture looks good. By foldability of earcups allows the headphones stow away. When using a smartphone you're comfortable with the switch / micro in cables and accessible in a very good sound quality. Wired headphone pair versus Bluetooth headphone pair: Again, there are pros and cons in this wired device I need no battery charging, but have the cable in a Bluetooth device I have from the battery and charge on.