TOPSTAR ELECTRONICS CO., LTD is a professional car audio factory, established in 2009, specialized in producing all kinds of car audio products, including car mp3/usb player, mp5 player, DVD/CD/MP3 player, subwoofer, power inverter, etc. We have our own dust-free workshop and SMT machines, so we can control quality directly. We strictly follow ISO9001 standard, every product must pass FQC, IPQC, FQC, Every lot of products must pass the temperature test, aging test and vibration test, we promise one year after sales service. Most of our products can pass CE, ROHS, SASO certificates. On the other hand, we keep improving production efficiency to control the cost, that's why we can supply quality products with economy price.  We also have our own R&D development team, we can develop as per customer?s requirement.