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ProGrade Digital SDXC UHS-II V90 Memory Card 128GB 2 PackThe V90 UHS-II SDXC Memory Card from ProGrade Digital features a storage capacity of 128GB and takes advantage of the UHS-II bus to support maximum read speeds of 300 MB/s and maximum write speeds of 250 MB/s. This card has also been designed with the V90 Video Speed Class rating which guarantees minimum write speeds of at least 90 MB/s allowing the card to be used in DSLRs mirrorless camcorders and digital cinema cameras that produce rich data streams including 6K 5K 4K UHD 4K and high bit rate MPEG-4 video. It is also well-suited for raw photos and rapid-fire bursts. 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 devices 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 support 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 guarantees minimum write speeds of 10 MB/s. Built for extreme conditions ProGrade Digitals UHS-II SDXC V90 Memory Card can withstand temperatures from -13 to 185-degree-F allowing you to take this card with you into extreme environments such as snow and deserts. It is also shockproof and X-ray proof and a built-in write protect switch helps to safeguard your content from being erased.