With the SanDisk Extreme SD UHS-I memory card save time transferring media with read speeds of up to 180MB/s powered by SanDisk QuickFlow Technology(64GB - 512GB). Pair with the SanDisk Professional PRO-READER SD and microSD to achieve maximum speeds (sold separately). With shot speeds of up to 130MB/s and UHS speed Class 3 (U3) recording, you're ready to capture high-resolution, stutter-free 4K UHD video. Plus, it's built to withstand weather, water, shocks, and other less-than-ideal conditions so you can rest assured that it's good to go wherever you go.