Super helmet, the bass is very present in extra bass mode, but for purists a button to switch to normal mode, more balanced and neutral. Closed headphones very isolating background noise. Liaison very good and very stable bt. Hands-free smartphone (built-in microphone), track forward back and pause / play from the headset. Beware, however, references the model says "black" by Amazon is the wired version called "PDB" and "white" version is made in black bluetooth headset but said "BTB". They are a bit tangled brushes. The wire cable comes with BT version and improves bandwidth needed.
