Spark High Definition In-ear Headphones are the combination of precision acoustics, unique design and expert ergonomic research. Powerful and accurate acoustics are achieved through high performance dynamic driver and special high definition acoustic filter built-in, resulting in full, explosive bass, intense mid-range and clear treble frequency response that will put a smile on your face every time the music plays. Advanced in-line mic/control for clear phone calls and music playback. Spark is compatible with iPhone, Blackberry and other 3.5mm-plug Smartphones.