Add more storage to your smartphone and enjoy more mobile content such as apps, e-books, video, music and movies. Class 10 UHS-I U1 rated, MicroSDTM Performance cards are ideal to transfer quickly and share your content while youre on the go. Read speed up to 50 MBs. SD adapter included. microSDHC memory card. Includes microSD adaptor to convert to SD size, for compatible devices. Not backwardly compatible with SD only devices.