Transcend's UHS-II Class 3 (U3) memory cards are designed for today's UHS-II-compliant digital system cameras and camcorders to maximize truly high speeds. With read speeds up to 285MB/s and write speeds up to 180MB/s, this memory card allows professional outdoor photographers and videographers to capture flawless RAW images and record ultra-high quality videos in 4K, 2K and Full HD quality. - Supports UHS-II Class 3 specification (U3) - Transfer speed: Up to 285MB/s read speed, Up to 180MB/s write speed* - Backwards compatible with UHS-I U3, UHS-I and Class 10 drives. - Meets the JIS IPX7 standard (Can stand 1m under water for up to 30 minutes) * Note! Speed ​​may vary depending on host hardware, software and usage.