The Lexar Professional GOLD microSDXCTM UHS-II Card is the perfect high-performance card for capturing drone and action camera footage and is also great for UHS-II portable gaming devices. Read speeds up to 280MB/s allow you to quickly transfer massive amounts of files and load games fast while write speeds up to 180MB/s and a V60 rating let you capture high-quality images and extended lengths of Full-HD and 4K UHD video without dropping frames. Up to 280MB/s read transfer, up to 180MB/s write speeds. Speeds based on internal testing. Actual performance may vary. 2Based on published performance of UHS-II cards compared to UHS-I cards. Lexar is not liable for any loss of data or images. [Product page only] Product appearance, performance, software offerings, and packaging may vary depending on ship date and available inventory. Actual usable memory capacity may vary. 1GB equals 1 billion bytes. Capacities: 128GB, 256GB Speed and Performance micro SDXC: 128GB – U3, V60, A1 (up to 280MB/s read, up to 100MB/s write) 256GB – U3, V60, A1 (up to 280MB/s read, up to 180MB/s write) Operating Temperature -25°C to 85°C (-13°F to 185°F) Storage Temperature -40°C to 85°C (-40°F to 185°F) 10-year limited warranty