Quick Overview Improve your workflow efficiency With SanDisk QuickFlow Technology, this card optimizes performance for timesaving media offloads with quick read speeds up to 200MB/s (64GB – 1TB). Pair with the SanDisk Professional PRO-READER SD and microSD™ to achieve maximum speeds (sold separately). Write speeds of up to 140MB/S Capture fast-action photos or shoot 4K UHD video with write speeds of up to 140MB/s. The SanDisk Extreme PRO microSDXC UHS-I Card lets you shoot more and faster. Great for capturing 4K UHD video Ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. With up to 1TB, the SanDisk Extreme PRO microSD UHS-I card lets you capture uninterrupted 4K UHD and Full HD video with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings. Load apps faster with A2 Get faster app performance for an outstanding smartphone experience thanks to the SanDisk Extreme PRO microSD card’s A2 Specification. Durable design for use in extreme environments SanDisk Extreme PRO microSDHC™ and microSDXC™ UHS-I Cards are shockproof, temperature-proof, waterproof, and X-ray-proof, so you can enjoy your adventures without worrying about the durability of your memory card.