DUAL DRIVER DESIGN: Experience crystal-clear music and calls with these earphones' two drivers (8mm,5mm) - one for bass, one for treble and ultra-clear mid-tones separately. DEEP BASS and INLINE MULTI-FUNCTION: Energetic sound with HEAVY BASS keeps you motivated and INLINE Microphone and remote for easy switching between calls and music. SPORTS USE: Sweat resistant design for increased durability, ideal for Running, Gym and other Sports use.