Delkin 64GB microSDXC Memory Card 660X 99MB/s UHS-I U3(DDMSD66064GB) Rated at 660X, with read speeds up to 99MB/s and write speeds up to 50MB/s Excels in Action Cameras & Cinema Cameras, including demanding video modes such as 4K, HD & 3D Approved for high frame rates surpassing 120fps, time-lapse, photo-burst mode, Protune, and HDR Improves your workflow with fast transfer of picture and video files from the cameras or card to your computer Rugged & durable, waterproof, dustproof, and x-ray proof, with a Lifetime Warranty Includes a full-sized SD adapter Rated 660X, UHS-I Speed Class 3 Transfer speeds up to 99MB/s