HDB311 is for you who love sports and music, providing ubiquitous comfort and music.
The HDB311 uses an 8mm drive unit to produce a wide, flat frequency curve and provides complete range detail. The delicate treble is matched with a powerful bass, giving an immersive music experience! You can also enjoy high sound quality during sports. Excellent personal comfort, firm and comfortable, never falling. IPX5 grade waterproof performance, effective against sweating and splashing water, even in sports can be used with peace of mind.