Sony Memory Card 64GB, UHS-II SD, CL10, U3, Max R260MB/s, W100MB/s (SF-M64/T) Read up to 260MB/s UHS-II UHS-II Reader (MRW-S1) is needed to realize transfer speed Transfer Speed (Write) Up to 100 MB/s Speed class U3, Class 10 Memory card case supplied File Rescue software provided via download Water proof and dust proof Durable and temperature proof UV guard, X-ray proof, magnet proof, anti static