It features a storage capacity of 128GB and takes advantage of the UHS-II bus to support sustained read speeds of 260 MB/s and sustained write speeds of 140 MB/s as well as sequential read speeds of 280 MB/s and sequential write speeds of 160 MB/s. This card has also been designed with the V60 Video Speed Class rating which guarantees minimum write speeds of 60 MB/s. UHS-II media achieves its 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 guarantees minimum write speeds of 10 MB/s. Aside from support for UHS-II V60 and U3 Angelbird also built this card with support for the Application Performance Class 1 (A1) spec which includes optimizations to give Android users an improved mobile experience delivering faster mobile app performance. The A1 spec allows the card to manage random read input-output access per second (IOPS) operations so it can quickly open apps and process accompanying tasks such as audio graphics saved profiles and in-app permissions. Built for extreme conditions Angelbird's 128GB AV Pro UHS-II microSDXC Memory Card is protected against water shock x-rays magnets and temperatures ranging from -13 to 185? F. Also featured is ECC data reliability wear leveling and power management for low power usage. Thanks to an included UHS-II microSD to SD adapter you'll be able to use this card to be used in SD-compatible devices. If not registered within this period the market-specific legal guarantee period comes into force.