Sandisk extreme pro 64gb sdxc uhs-i card - c10, u3, v30, 4k uhd, sd card. It pro's choice for reliability, performance and uncompromising image and 4k uhd video quality.
at a glance
-read speeds up to 170mb/s* [64gb-1tb]
-write speeds up to 90mb/s*
-perfect for shooting 4k uhd video(1) and sequential burst mode photography
-uhs speed class 3 (u3) and video speed class 30 (v30)(2)
-built for & tested in harsh conditions(3): temperature-proof, waterproof, shock-proof, & x-ray-proof