Angelbird 64gb AV Pro Ultra High Speed uhs-ii sdxc Memory CardGeneral Features Sustained Read Speed: 300 MB s Sustained Write Speed: 280 MB s Min Write Speed: 90 MB s SDXC UHS II V90 U3 Class 10 Records Full HD, 3D, and 4K video Stable Stream Operating Temperature: 13 to 185F 25 to 85C Storage Temperature: 40 to 185F 40 to 85C Resistant against shock, dust, water, temperature extremes, x rays, and magnets Sticker free Built in write protect switch Works with Canon, Sony, Leica, Nikon, Fujifilm, Blackmagic