SanDisk Ultra Microsoft and Microsoft cards are fast for better pictures, app performance, and full HD video.(1) Ideal for Android smartphones and tablets, these A1-rated cards load apps faster for a greater smartphone experience.(3) To be had in capacities as much as 400GB, You be ready to take more pictures and full HD video and capture life at its fullest. Built to Perform in harsh conditions, SanDisk Ultra micro SD cards are water resistant, temperature proof, shockproof, and X-ray proof.(2) The micro SD card is also rated class 10 for full HD video recording performance and a 10-year limited warranty. | 1gb=1, 000, 000, 000 bytes. Actual user storage less. | (for 64gb-256gb): as much as 100MB/s read speed; write speed lower. (For 16GB-32GB): as much as 98MB/s read speed; write speed lower. In response to internal testing; performance is also lower depending on host device, interface, usage conditions and other factors. 1Mb=1, 000, 000 bytes. | (1) full HD (1920×1080) video enhance would possibly vary based upon host device, file attributes, and other factors. | (2) card only | (3) results would possibly vary In response to host device, app Type and other factors. | (5) download and installation required. | (6) In response to 4.1GB transfer of photos (AVG. File 3.5MB) with USB 3.0 reader. Results would possibly vary In response to host device, file attributes and other factors. | (7) approximations; results and full HD (1920×1080) video enhance would possibly vary In response to host device, file attributes and other factors. Compatible with microSDHC and micro SDXC supporting host devices.