Maybe you are a open earphones purchasing manager, who are looking for high quality open earphones, and Cooyee are a professional manufacturer & supplier that can meet your needs. Not only open earphones we produced have certificated the international industry standard, but we can also meet your customization needs. We provide online, timely service and you can get professional guidance on open earphones. Don't hesitate to get in touch with us if you are interested in open earphones, we won't let you down.