BASN is a professional in-ear monitor headphones brand. Our earphone structure engineers have studied thousands of custom earphones, finally, they find one that compatible with most people. What's more, many musicians, vocalists, drummers, guitarists, keyboardists, bassists, and audio mixers are invited to refine the sound and recommend it to their band members. We name this earphone to be "Bsinger", and we have developed another series of ear monitors based on it. They are "Bmaster Series", "Metalen Series", and more. And the new IEM's is coming soon.