About this item Class 10, U3, V30 speed class performance with read speeds up to 100MB/s for fast and smooth burst mode HD Photography and 4K Ultra HD Videography​ A1 App Performance enables apps to run directly from the microSD card, delivering faster app launch and performance. A1 provides minimally 1500 IOPS (Read) and 500 IOPS (Write)​ Record and transfer videos, photos, music, files and more from microSD enabled host devices such as Android smartphones and tablets, action and surveillance cameras, drones, computers and more​ Included SD adapter for compatibility with SD enabled host devices including DSLR cameras, video cameras, desktops, and laptops​ Reliable & Durable: Magnet Proof, Shock Proof, Temperature Proof, Waterproof​ 256GB Premier-X Class 10 U3 V30 microSDXC Flash Memory Card - 100MB/s, 10, U3, V30, A1, 4K UHD, Full HD, UHS-I, micro SD Electronics › Computers & Accessories › Computer Accessories & Peripherals › Memory Cards › Micro SD Cards Electronics › Computers & Accessories › Computer Accessories & Peripherals › Memory Cards › Micro SD Cards Electronics › Computers & Accessories › Computer Accessories & Peripherals › Memory Cards › Micro SD Cards Electronics › Computers & Accessories › Computer Accessories & Peripherals › Memory Cards › Micro SD Cards