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...
"The Red" HDSS IEMs by Blue Ever Blue are one of the most highly praised earphones in their price range. Small and comfortable with dynamics formerly unavailable at this price point. If not completely satisfied in 30 days, BioLinks will refund your money.