First custom earphone in the world with a single 14mm dynamic driver couples with advanced frequency suppression technology (FST). Frequency Response: 10-20000 Hz Impedance：16ohms（including cable） Sensitivity (at 1kHz)：116dB spl (1mW) Important: Due to the size of the driver, people with small ears may not be able to fit. We would need your ear impressions to check for sizes...
Our Fusion model provides a "full range" of sound, with excellent highs, mids, and lows in these speakers. Fusion for SmartPhone comes with a full-control mic for iPhone, fabric, tangle-free cord, and 90-degree gold-plated sport jack. Note: this microphone also works with other SmartPhones that accept direct-connect 3.5mm jacks, but click control function may not with all SmartPhones.