microSDHC Class 4 (Standard) Smartphones, tablet PCs, ebook readers, hand-held game consoles and other devices usually have a limited amount of built-in storage. Transcend's microSDHC Class 4 cards are a cost-effective way to expand device memory capacity and store many times more movies, music, ebooks and app data. - Fully complies with SD 2.0 specifications - Class 4 rating guarantees reliable write performance - Meets the requirements of most mobile devices, including digital cameras, cell phones, and eBook readers - Built-in Error Correcting Code (ECC) to detect and correct transfer errors - Exclusive RecoveRx photo recovery software