Professional performance for your needs. The Lexar Professional 1800x GOLD Series SDXC UHS-II memory card is designed for mirrorless or DSLR cameras and allows you to take photos in high quality and fantastic Full HD and 4K videos with read speed of up to 270MB/s1 and up to 180MB/s write speed to 180MB/s to 1 to 1. MB/s. Accelerate your workflow from field to post production. The Lexar Professional 1800x UHS-II GOLD Series SDXC offers a very high read speed of up to 270MB/s1 to speed up your production workflow - saves time and allows you to take photos instantly. V60 rated for uninterrupted recording of Full HD and 4K videos. With the latest UHS-II technology and a write speed of up to 180MB/s. The Lexar Professional 1800x UHS-II GOLD Series SDXC allows you to take photos even with continuous shooting. And thanks to the V60 and UHS 3 (U3)2 speed class, you can capture incredible Full HD video and 4K video with large capacities of up to 256 GB. Designed for durability. These cards guarantee you the performance you need to record and store your valuable data in a variety of elements. Lexar Professional 1800x UHS-II SDXC card is waterproof and resistant to extreme temperatures, shock, vibration and X3 X-rays. Backwards compatible with the highest UHS-I speeds. For even more versatility, the memory cards are also backward compatible with UHS-I devices and work up to the top speeds of the UHS-I. Strictly tested. All Lexar product designs are thoroughly tested in Lexar quality labs, facilities with more than 1,100 digital devices to ensure performance, quality, compatibility and reliability.