<p><em>ProMaster Velocity CINE Memory Cards are some of the fastest cards in the world!</em></p> <p>This 512GB SDXC Velocity&nbsp;CINE card&nbsp;is&nbsp;ideal for ultra-high resolution cinematic video and high-speed RAW photography, especially when used with UHS-II cameras and card readers. Say goodbye to dropped frames or buffering problems&mdash;its 250MB/s write speed and V90 video speed class mean your camera will never outpace this card. Additionally,&nbsp;its high read speed helps save time when transferring files. Velocity CINE Cards are also backward compatible with UHS-I cameras and readers, so you can be sure to get the highest performance no matter what devices you&rsquo;re using.</p> <p><strong>Key features:</strong></p> <div>512GB&nbsp;storage capacity</div> <div>2000X</div> <div>300MB/s read speed</div> <div>250MB/s write speed</div> <div>UHS-II Speed class 3, U3</div> <div>V90 video speed class</div> <div>UHS-I backward compatible</div> <div>Limited lifetime warranty</div> <div>48-hour replacement guarantee (see memory.promaster.com for details)</div>