Verbatim 64GB Pro 600X SDXC Memory Card, UHS-I V30 U3 Class 10 V30 video speed class - supports 4K video recording UHS-I Interface, U3 speed rated Up to 90MB/s read speed. Up to 45MB/s write speed Water resistant, shock proof and temperature proof Verbatim has been a leader in data storage technology since 1969, and guarantees this product with a limited lifetime warranty and technical support 64gb Capacity Class 10/uhs-1 Speed Rated For Optional Use In Standard High Speed Host Devices Premium-grade Components For Maximum Performance & Reliability 600x (90mb/sec)--ideal For Multimegapixel Photography & High Def Video Recording For Faster Workflow & Capture Uhs-1 Interface Compatible For Fast Read/write Performance (support Host Bus Speeds Up To 104mb/sec) Write Protect Switch Prevents Accidental Data Deletion Requires Sdxc(tm) Host Device Write Speeds Lower Than 600x--use Of Usb 3.0 Connected Card Reader & Usb 3.0 Host Computer Recommended For Maximum Performance