Dart Cheng Communication Limited is a leading smart watch smart bracelet wireless earphone and other smart wearable device manufacturer with strong RD abiity&one-stop production mode of operationprofessional quality testing equipment and complete qualitycontrol.,brWe provide hassle-free OEM>ODM design /mold designcircuit design,hardware and software design to final performance evaluationproofing,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.