The SanDisk 256GB Extreme MicroSDXC UHS I Memory Card 4K A2 SDSQXA1 256G GN6MN is a high-speed memory card designed for universal compatibility and vast storage capacity. With a speed class of A2, it offers fast data transfer rates suitable for 4K video recording. The card is backed by a 2-year manufacturer warranty, ensuring durability and reliability. It is a dependable choice for those in need of a versatile and high-performance memory card for their cell phone or other portable devices.