Model - Transcend microSDXC/SDHC 300S, Type - micro SDXC/SDHC 300S, 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 - 11 x 15 x 1mm, Weight - 40 gm, Others - Supported device: Smartphones, tablets, digital cameras, Part No - TS256GUSD300S-A, Warranty - 5 years, Country of Origin - Taiwan, Made in/ Assemble - Taiwan/China