Contron has been in acoustic industry for over forty years,we are a OEM/ODM company that specialize in headphone and speaker,such as ANC True Wireless Stereo headphone,Over ear headphone,In ear headphone and high performance diver speaker.Our professional acoustic team and patents has made Cotron maintain the leading position in this industry.Also because we are focus in building the top of the line performance,lots of world-known brand has chosen Cotron as their partner.