Get the SanDisk Memory Zone application for easy file management (available on Google Play). Designed and tested for extreme conditions; withstands extreme temperatures, water, shock and X-rays. UHD 4K compatible with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30). Up to 170 MB/s read and 90 MB/s write for fast captures and transfers. Ideal for Android smartphones and tablets, as well as action cameras and drones.Extreme speeds for fast transfers, powerful apps and 4K UHD video. Ideal for your Android smartphone, action cameras or drones, this high-performance microSD card combines recording of 4K UHD video, Full HD video and high-resolution photos. The SanDisk Extreme PRO ultra-fast microSDXC UHSI memory card can read at up to 170 MB/s and write at up to 90 MB/s. What's more, it's A2-rated, so you can enjoy fast application performance for an exceptional experience on your smartphone.