Anywhere you listen to music, this will create your own listening room. It cuts off most of outside noises, and recreates the source music faithfully. This product has gone through the aging process to optimize the quality. We wanted to create earphones equal to or better than the expensive models of other companies. We pursued the best quality without compromise. For example, the housing is made of the same hard solid metal used in musical instruments, to have the best quality on the low to high ranges. We also reduced the echo of the housing to the minimum, to improve the bass quality. We have applied our aging process to this model to get the best of each product. This unit is ready for the optimum enjoyment of your music. This product is made of excellent quality in Japan by Micro Solution. More information on this and other Micro Solution products can be found at microsolutionusa.com. We use eco-friendly simple packaging for all our products.