SanDisk Extreme 64GB Speed Up to 170 MB/s SDXC UHS-I Flash MicroSD Memory Card Description The SanDisk Extreme 64GB microSDXC UHS-I Memory Card is designed for high-speed performance, offering read speeds up to 170MB/s and write speeds up to 80MB/s. With its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings, this card ensures seamless 4K UHD video recording and high-resolution photography. It also supports Application Performance Class 2 (A2), enhancing app performance on smartphones and tablets. Built for durability, the card is shockproof, temperature-proof, waterproof, and x-ray proof, making it ideal for use in rugged environments. With 64GB of storage, it?s a great choice for action cameras, drones, and other devices that require fast, reliable memory.