Transcend\'s microSDXC/SDHC 500S memory cards are manufactured with top-tier MLC NAND flash, making them durable and reliable. Incredible transfer speeds, the cards meet UHS Video Speed Class 30 (V30) standards, allowing for smooth, uninterrupted 4K video capture. Transcend\'s microSDXC/SDHC 500S memory cards meet both the UHS Speed Class 3 (U3) and the UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recordings, with read/write speeds of up to 95MB/s and 80MB/s respectively. V30 standard compliance applies only to 16GB-64GB capacities. 1 year warranty.