The HDB671 is Superlux's latest wireless BT earphone. It has a simple and stylish design. What's even better is that the HDB671 uses a 40 mm moving coil unit, which provides a near perfect balance between instrumental sound and clarity. Together with the soft composite material earmuffs, it is not only comfortable to wear, but also has an unexpected effect on the covering and sound insulation. Let all the music details be presented smoothly.