Tested and certified to work seamlessly with Chromebooks Up to 120MB/s transfer speeds let you move photos and files fast. Load Android apps faster with A1-rated performance. microSD memory card. 256GB capacity. Read speed 120MB per sec. Write speed 120MB per sec. Includes microSD adaptor to convert to SD size, for compatible devices. Not backwardly compatible with SD only devices. EAN: 619659185381.