Good sound quality earphone for music and phone calls. The sound is clear and crisp, good for listening to music during workouts, or listening to audio books during commute; the microphone is excellent, any calls could be made clearly even on a noisy treadmill. It is fully fit for all major 3.5mm jack of audio player/smartphone and tablet. Headphone with strong bass-driven stereo sound with passive noise isolating earphones provides good listening experience and clear calling.