From Manufacturer
This B&H Kit bundles a Lexar 512GB Professional GOLD CFexpress 4.0 Type B Memory Card with a Lexar 256GB Professional 2000x UHS-II SDXC Memory Card, making it suitable for use with cameras that have one CFexpress Type B card slot and one UHS-II SDXC card slot.
Experience the CFexpress 4.0 advantage and capture 8K raw cinema-quality video with the 512GB Professional GOLD CFexpress 4.0 Type B Memory Card from Lexar, which delivers read speeds of up to 3600 MB/s, write speeds of up to 3300 MB/s, and sustained write speeds of 3000 MB/s, all of which help to expedite post-production. Also featured is 8-point protection against temperatures, vibration, wear-out, dust (IP5X), drops, shocks, compression, and bends. Protection is provided by a limited lifetime warranty and data recovery software.
The 256GB Professional 2000x UHS-II SDXC Memory Card from Lexar features a storage capacity of 256GB and takes advantage of the UHS-II bus to support advanced DSLR 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 4K, 3D, and Full HD video, and can achieve maximum read speeds of up to 300 MB/s and maximum write speeds of up to 260 MB/s. Thanks to its V90 speed class rating, minimum write speeds are guaranteed not to drop below 90 MB/s, making it qualified for use with cameras that include the Blackmagic Pocket 6K G2 and Ursa G2.
UHS-II cards achieve their speed through an extra row of pins, and while this card has been designed for cameras that are UHS-II / V90 compatible, it may be used in devices that do not support UHS-II / V90. However, bear in mind that this card will then default to your device's speed class and bus rating, such as UHS-II and V60, which supports minimum write speeds of 60 MB/s, UHS-II and V30, which supports minimum write speeds of 30 MB/s, or UHS-I and U3, which also supports minimum write speeds of 30 MB/s. If your device does not support U3, this card is compatible with the U1 and Class 10 standards, each of which guarantee minimum write speeds of 10 MB/s.
As with most Lexar media, this memory card is able to withstand water, shock, vibration, X-rays, and temperatures from -13 to 185°F, allowing you to take this card with you into extreme environments, such as snow and deserts. Should the card become compromised, users in the Americas will benefit from a limited lifetime warranty, while those in Germany and regions not recognizing the lifetime warranty will benefit from a limited 10-year warranty.