Dart Cheng Communication Limited is a leading smart watch \smart bracelet \wireless earphone and other smart wearable device manufacturer with strong R&D abiity,one-stop production mode of operation,professional quality testing equipment and complete qualitycontrol.We provide hassle-free OEM/ODM design ,mold design,circuit design,hardware and software design to final performance evaluation,proofing,trial production to large-scale mass production.We are committed to providing high quality products and good service for customers at home and abroad to achieve long-term cooperation and win-win goals.