Fast enough to keep up with the action - Get extreme speeds for fast transfer, app performance, and 4K UHDIdeal for your Android smart phone, action cameras or drones, this high-performance micro - SD card does 4K UHD video recording, Full HD video, and high-resolution photos. The super-fast SanDisk Extreme PRO micro - SDXC memory card reads up to 170MB/s and writes up to 90MB/s. Plus, it A2-rated, so you can get fast application performance for an exceptional smart phone experience. - Save time transferring content Quick read speeds of up to 170MB/s let you transfer 1000 high-resolution photos and 30 minutes of 4K video (24GB) in less than 3 minutes - Write speeds of up to 90MB/s Capture fast-action photos or shoot 4K UHD video with write speeds of up to 90MB/s. - SDXC UHS-I Card lets you shoot more and faster. - Great for capturing 4K UHD Video Ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. With up to 1TB, the SanDisk Extreme PRO micro - SD UHS-I card lets you capture uninterrupted 4K UHD and Full HD video with its UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings. Load apps faster with A2 Get faster app performance for an outstanding smart phone experience thanks to the SanDisk Extreme PRO micro SD card? A2 Specification. - Durable design for use in extreme environments SanDisk Extreme PRO micro - SDHC and micro - SDXC UHS-I Cards are shockproof, temperature-proof, waterproof, and X-ray-proof, so you can enjoy your adventures without worrying about the durability of your memory card. - Compatible with Mobile - Mate? USB 3.0 Reader Use the Mobile - Mate USB 3.0 micro - SD Card Reader with transfer speeds of up to 160MB/s, so you can move big files fast, move a lot of files fast or just make frequent file transfers that much quicker. - Product Specification