Model - Transcend SDXC/SDHC 300S, Type - SDXC/SDHC Class 10 UHS-I U3, V30, Storage Capacity - 256GB, Access Time Read (Mbps) - 95Mbps, Access Time Write (Mbps) - 40Mbps, Flash Type - 3D NAND flash, Speed Class - Class 10, UHS Speed Class - UHS-I U3, Video Speed Class - V30, Insertion/Removal Cycles - 10,000, Shockproof - Yes, Waterproof - Yes, Magnet Proof - Yes, X-Ray Proof - Yes, Temperature Proof - Yes, Operating Voltage - 2.7V - 3.6V, Dimension - 32 x 24 x 2.1mm, Weight - 2 gm, Others - Feature: Record story in great detail, memory cards provide the performance and capacity necessary to harness the full power of your UHS-I compliant digital camera or camcorder, In addition to incredible transfer speeds, the cards meet UHS Video Speed Class 30 (V30) standards, allowing for smooth, uninterrupted 4K video capture, Show the transfer capabilities, Built for extremes, Part No - TS256GSDC300S, Warranty - 5 Years, Country of Origin - Taiwan, Made in/ Assemble - Taiwan/China