This ProMaster 256GB Advanced SDXC memory card offers excellent performance at an affordable price. With U3 design and V30 speeds, Advanced Memory Cards enable your camera to perform well in all modes including high-resolution video capture. Key features: 256GB storage capacity UHS-1 speed class 3, U3 V30 video speed class Operating temperature range: 32?F to 158?F (0?C to 70?C) Limited lifetime warranty