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...
Merkury Innovations Sport Ear Buds (Assorted Colors)New Sport Headphones were designed for the athlete in you. With Vertical In-the-Ear design and non-slip silicone earbuds, these headphones will fit securely and comfortably even when you're at your most active. Three pairs of soft silicone ear inserts ensure a perfect fit for nearly everyone.