The fastest micro sd memory card available on the market, unparalleled speed, guarantees optimal experience with smartphones and tablets. the sandisk extreme pro uhs-ii standard, u3 speed class, sd10 class memory cards ensure uncompromising performance for any activities requiring a high use of uninterrupted memory. reaches up to 275 mb/s (1.833x) read and 100 mb/s write speeds. make your action videos in full hd, 3d and 4k (cinema quality), thanks to uhs-ii standard,u3 speed class and sd10 class cards. read speed up to 275 mb/s, write speed up to 100 mb/s. uhs-ii standard; u3 speed class; sd10 class. usb 3.0 reader included. waterproof, resistant to high temperatures, x-rays and shocks. operating/storage temperature: from -25oc to 85oc / from -40oc to 85oc. compatible with all host devices that support sdhc (xc), sdhc (xc) uhs-