Kingston Digital 64GB microSDXC UHS-I Speed Class 3 Flash Memory Card (SDCA3/64GBSP) Fast/Performance - UHS-I Speed Class 3 - up to 90MB/s read and 80MB/s write for continuous shooting, video recording and fast file transfer Resistant - waterproof, shock proof, X-ray proof and temperature proof to perform even in harsh environments Compliant - with the SD Association specifications Compatible - with microSDHC & microSDXC host devices; not compatible with standard micro SD-enabled devices/readers; microSDXC cards are not compatible with microSDHC-enabled devices/readers Guaranteed - lifetime warranty, free technical support