This card is the ADATA Premier 85/A1 64GB microSDXC memory card, a UHS-I A1-rated card offering 85MB/s read and 25MB/s write speeds, positioned by ADATA as an everyday-reliable card for phones, tablets and cameras rather than a professional video-capture card. The A1 application performance rating guarantees a minimum level of random read/write IOPS, which is what actually determines how smoothly apps and games run when installed directly onto the card on an Android device rather than the internal drive. It carries SDMI compliance and ships with a full-size SD adapter for use in any standard SD card slot, though it isn't compatible with SDHC-only cameras or readers. At 64GB it offers solid everyday capacity for photo, video and app storage, and ADATA backs the Premier 85/A1 line with a lifetime warranty on this retail-packaged card.