Extreme speeds for fast data transfers, app performance, and 4K UHD. Ideal for your Android smartphone, action cameras, or drones – with this high-performance microSD memory card, you can capture 4K UHD video, Full HD video, and high-resolution photos. The super-fast SanDisk Extreme PRO microSDXC UHS-I memory card reads at speeds of up to 170 MB/s and writes at speeds of up to 90 MB/s. It is rated A2, ensuring fast app performance for an excellent smartphone experience.