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...
“ I don't like to buy headphones solely based on people's recommendations without auditioning them first, but the reality is, you often have to because you just don't have the opportunity to audition exactly the models you are interested in due to where you live. The Westone 3 is one such case where I had to rely on internet reviews, and I regret the purchase. The problem with trusting online...” --Lunatique