The SanDisk Extreme PRO® CFast™ 2.0 memory card delivers the high performance that broadcast, cinema, and photography professionals demand today. The card has the speed, capacity and performance needed to record cinema quality 4K video (4096x2160p). It delivers write speeds of up to 450Mbps and data transfer speeds, up to 525Mbps. This is a great memory card for professional cameras and camcorders.