Lexar professional 1000x sdhcsdxc uhs ii cards let you quickly capture and transfer high quality photos and 1080p full hd 3d and 4k video with a read transfer speed up to 150mbs write speeds slower the cards leverage uhs ii technology uhs speed class 3 u3 for high speed performance this dramatically accelerates workflow from start to finish so you can save time and get back to the business of photography