Designed for the Blackmagic Design URSA Mini Pro, the 1TB Match Pack from Angelbird bundles two 256GB AV Pro CFast 2.0 cards with two 128GB AV Pro UHS-II SDXC cards.The 256GB CFast 2.0 cards have a SATA III 6 Gb/s interface, sustained read speeds of up to 550 MB/s, sustained write speeds of up to 400 MB/s, Stable Stream technology, an over provisioning of ~7.6%, TRIM, EDC/ECC for data reliability, EMS protection, a built-in cache, SMART technology, an MTBF of two million hours, 10 years of data retention at 77?F, plus protection against magnets and x-rays, an operating shock resistance of 50 g, and an operating vibration resistance of 3.1 g.The 128GB AV Pro UHS-II SDXC cards feature sustained read speeds of up to 300 MB/s and sustained write speeds of up to 260 MB/s. Thanks to its V90 Video Speed Class rating, minimum write speeds of 90 MB/s are guaranteed. This card also features a built-in write protect switch, wear leveling, power management for low power usage, ECC protection, and water resistance.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.Both types of media will record Full HD, 3D, and 4K video, and are protected with shock, dust, and temperature proofing. Included is a basICColor Mini Target, plus a media pouch that can hold four CFast or CompactFlash cards, six SD cards, and two XQD cards.General FeaturesBuilt for the Blackmagic Design URSA Mini ProOptimized for raw recording and dual-card modeStable StreamX-ray & magnetic proofDurable buildIncludes media pouch for four CFast or CompactFlash cards, six SD cards, and two XQD cards256GB AV Pro CFSustained read speeds of 550 MB/s and sustained write speeds of 400 MB/sCFast 2.0 compliantRecords Full HD, 3D, and 4K videoShock, dust, and temperature proofESD & overload protectionTemperature sensor, TRIM, ECC, EMS protection, built-in cache, and SMART128GB AV Pro SDSustained read speeds of up to 300 MB/s and sustained write speeds of up to 260 MB/sSDXC | UHS-II | V90 | U3 | Class 10Records Full HD, 3D, and 4K videoShock, dust, water, and temperature proofBuilt-in write-protect switchWear leveling, power management for low power usage, and ECC