4K (Compatible device required). Action. 64GB (1GB/Go = 1,000,000,000 bytes, Actual user storage less). Speeds up to 170 MB/s (UP to 170 MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-1 104MB/s, require compatible devices capable of reaching such speeds. Up to 80MB/s write speeds. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB = 1,000,000 bytes) read. Compatible with SanDisk professional pro-reader SD and microSD to achieve stated read speeds. SanDisk Extreme microSDXC card Extreme performance with SanDisk quickflow technology. 80 MB/s (UP to 170 MB/s read speeds, engineered with proprietary technology to reach speeds beyond UHS-1 104MB/s, require compatible devices capable of reaching such speeds. Up to 80MB/s write speeds. Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB = 1,000,000 bytes). Water Proof (Visit www.sandisk.com/proof). Temperature proof (Visit www.sandisk.com/proof). Shock proof (Visit www.sandisk.com/proof). X-ray proof (Visit www.sandisk.com/proof). Includes: Rescue Pro 1-year software download offer. Terms and conditions apply. See inside for details. microSDXC UHS-I card. U3 (Download required). A2 (Results may vary based on host device, app type and other factors) app performance. Lifetime limited warranty. Warranty guide. www.sandisk.com/wug. 30-year warranty in Germany and regions not recognizing lifetime warranty. CE listed. FCC listed. EAC. UK CA. www.sandisk.com/proof. www.sandisk.com/wug. www.sandisk.com. Packaged with 20%+ recycled material. Made in Taiwan.