With transfer speeds of up to 160MB/s, this card offers the fast, efficient performance you expect from the global leader in flash memory cards**. This industry-leading memory card is optimized for professional-grade video capture, with a minimum sustained write speed of 65MB/s for rich 4K and Full HD video. Capacities up to 256GB accommodate hours of video and thousands of high-resolution images. So you never miss a scene or shot, this memory card resists extreme temperatures, shock, and other conditions.

Designed for professional videographers and photographers

• Optimized for 4K video capture**
• Transfer speeds of up to 160MB/s for burst mode photography
• Shot speeds up to 150MB/s
• VPG-65 for sustained video recording speeds of 65MB/s**
• Capacities up to 256GB for storing hours of video**

Via: http://www.sandisk.com/products/memory-cards/compactflash/extremepro-160mbs/?capacity=256GB