The Delkin Devices 64GB SDXC UHS-II Black Memory Card offers high performance when recording videos with professional camcorders and cine cameras. It allows video resolutions of 3D, 4K, and Full HD with maximum read & write speeds of 300 MB/s & 250 MB/s. Compatible with UHS-II compliant cameras, the memory card has a video class rating of V90 that ensures a minimum writing speed of 90 MB/s. This Delkin Devices "Black" series memory card comes with a solid molded design that offers three times more durability than standard memory cards. The tightly-sealed construction shields the internal parts against water & dust. This memory card can function in extreme temperatures from 32°F to 158°F.