... cables, USB connectors, DB connectors, RCA jacks, hooks, etc. Our Headphone Adapter as well as other products mainly sell to North America ... Asia and other foreign countries. Our monthly production capacity of Headphone Adapter is 1,000,000pcs, but this is not our utmost ... you.IF you have any interest about or inquiry of Headphone Adapter ,please contact me freely! We will quote you the latest ...