The OWC or Other World Computing 64GB Atlas Ultra UHS-II SDXC Memory Card features a storage capacity of 64GB and takes advantage of the UHS-II bus to support advanced DSLR or mirrorless functions such as continuous shutter bursts and rapid shooting, as well as raw and JPEG captures. This card is also well-suited for video capture, including 6K, 4K, Full HD, and 3D video. It can achieve max sequential read speeds of up to 300 MB per second and max sequential write speeds of up to 250 MB per second. Thanks to its V90 speed class rating, minimum sustained write speeds are guaranteed not to drop below 90 MB per second. It has an ambient operating temperature of negative 25 degrees C to 85 degrees C and ambient non-operating of negative 40-degree C to 85 degrees C.