Exascend EXPC3W512GB VIGOR CFexpress 2.0 Type B Memory Card - 512GBDesigned for extended shoots and continuous recording, the 512GB VIGOR CFexpress 2. 0 Type B Memory Card from Exascend can capture 8K raw video and photos. It combines 3D NAND flash memory with a PCIe 3. 0 controller to deliver max sequential read speeds of 1800 MB s and max sequential write speeds of 1700 MB s, as well as sustained read speeds of 1800 MB s and sustained write speeds of 1700 MB s. Built to perform in extreme temperatures of 14 to 158F