Key Features Reaches Class 10 and UHS-I Speed Class 3 (U3) standard Read up to 90MB/s; Write up to 80MB/s Supports all equipment, smartphones and tablets with micro SD interface MLC Flash Chip technology improves storage performance and durability Supports 4K HD recording PRO+ micro SDHC Class 10 UHS-I U3 Card (with Adapter) Outstanding and Professional Performance Ever The ultra high speed PRO+ micro SDXC UHS-I memory card 64GB brings you a new experience of outstanding transmission. With the Class 10 and UHS-I U3 speed standard, the read speed is up to 90MB/s, providing fast access to a large number of files. The flash chip adopted MLC technology with which the card performs certain stability. It supports 4K full HD recording, you can enjoy the highest-quality of video chips. An SD adapter is included with the packing. Read: Up to 90MB/s Write: Up to 80MB/s Features: Reaches Class 10 and UHS-I Speed Class 3 (U3) standard Read up to 90MB/s; Write up to 80MB/s Supports all equipment, smartphones and tablets with micro SD interface MLC Flash Chip technology improves storage performance and durability Supports 4K HD recording Waterproof, shock and temperature-resistant SD adapter included FCC and CE safety certificates Limited Lifetime Warranty