Transcend's SDXC/SDHC 300S 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. Let this moment stay by selecting the right memory card for your camera. Featuring high capacities and excellent performance, Transcend's SDXC/SDHC 300S memory cards are great for recording slices of everyday life. To deliver the best performance and stability, Transcend's SD memory cards are tested to withstand extreme conditions. They are temperature resistant, waterproof, shock proof, X-ray proof, and static proof. Appearance Dimensions 32 mm x 24 mm x 2.1 mm (1.26" x 0.94" x 0.08") Weight 2 g (0.07 oz) Storage Capacity 1 TB Flash Type 3D NAND flash 2D NAND flash Operating Environment Operating Temperature -25°C (-13°F) ~ 85°C (185°F) Operating Voltage 2.7V ~ 3.6V Performance Speed Class UHS-I U3 UHS-I U1 Class 10 V30 V10 Sequential Read/Write (CrystalDiskMark) 1 TB up to 100/85 MB/s Insertion/Removal Cycles 10,000 Note Speed may vary due to host hardware, software, usage, and storage capacity.