We are one of the leading manufactrurers for USB products.We mainly manufacture USB cardreader,USB to Ide,USB Bluetooth,USB Lan,USB printer cable,SIM Backup and HDD.Our products are very popular with our customers for their good quality and competitive price.Our products haven't got any certification,if needed,we can do them also.If you are interested with our products,we will be glad to satisfy you at all times!