SF-G series TOUGH specification UHS-II SD Memory Cards, the World's toughest and fastest SD card, 18 times stronger4 than standard SD card with an ultra-rugged design that is bend-proof, drop-proof to 5 meters, water-proof and dust-proof and up to 300MB/s Read, 299MB/s write2 speeds. TOUGH SPECS: World's first one-piece molded construction with high hardness materials have resulted in the world's highest level of bend strength, 18 times greater than the SD standard RIBLESS, NO WRITE PROTECTION SWITCH DESIGN: World's first ribless, no write protection switch design6 Removed easy to break parts, such as rib FAST FILE TRANSFER: Up to 300 MB/s transfer speed and up to 299MB/s write speed 3. UHS-II, Class 10, U3 compliant. Fast writing speed excellent for 4K recording and continuous burst mode shooting HIGHEST LEVEL WATERPROOF (IPX8*5) & DUSTPROOF (IP6X*5): Completely sealed with monolithic structure, this card is waterproof (compliant to IPX8) BACKWARD COMPATIBLE WITH UHS-I COMPATIBLE EQUIPMENT: While highest performance is obtained using a UHS-II compatible camera, (up to 95MB/s Transfer and 90MB/s Writing speeds3)