ROSEN TECH CO.,LTD, we are factory specializing in manufacture and export of USB chargers, iPad&iPhone accessories, USB HUB,HDD Enclosure for more than nine years. having been passed ISO9001 quality management certification and with series of testing,researching machine and heat-sealed machine. We can effect customer fast delivery, strict QC system,our monthly production capacity reaches to 80K-100K. Advocating the spirit of our brand "Tinpec"---- There is nothing permanent except change. Rosen will keep offering not only good products but also excellent service to customer.