YA CAI DIGITAL CO.,LTD is a professional manufacturer of a wide range of computer peripherals , which is a enterprise with high technology specialize on researching, producing, selling of computer accessory products,such as  USB card reader, PCI spread card, USB link line, PMCIA card,USB-HUB,USB Bluetooth and other products. our card read products of SD,CF,XD,SIM and so on sold abroad and very popular.