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.
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...