Transcend's microSDXC 300S memory card provides the performance and capacity required to harness the full power of your UHS-I compatible smartphone, tablet or other deviceIn addition to incredible transfer speeds, the card meets the UHS Video Speed ​​Class 30 (V30) standard, enabling smooth and uninterrupted 4K video recording. - Supports Ultra High Speed ​​Class 3 specification (U3) and Video Speed ​​Class 30 (V30)- Class 10 compliant - App Performance Class 1 (A1)- Transfer speed: Up to 95MB/s read speed, Up to 40MB/s write speed*- Meets JIS IPX7 standard (Can withstand 1m under water in up to 30 minutes)- incl. adapter to be used as an SDXC card * Note! Speed ​​may vary depending on host hardware, software and usage.