The Kingston FCR-HS3 and FCR-MLG3 USB 3.0 Flash Card readers make sure transfer speeds stay current. The FCR-HS3 and FCR-MLG3 are fully compatible with the latest class 10 and UHS-I flash storage. Both use USB 3.0 specification. USB 3.0 ensures a maximum transfer rate of 5Gb/s. The FCR-HS3 features an ultra portable, metal construction. There is a built-in LED indicator. The FCR-HS3 had complete compatibility with a 19-in-1 flash card format design. Its little brother, the FCR-MLG3, features a much smaller portable size. The FCR-MLG3 uses a 7-in-1 flash card compatibility design. The sides of the FCR-MLG3 retract to protect the interfaces on both sides.