Also perfect for your action camera and drones SanDisk cards are compatible with smartphones, tablets, action cameras and drones. Write speeds of up to 90MB/s Capture fast-action photos or shoot 4K UHD video with write speeds of up to 90MB/s. The SanDisk Extreme PRO microSDXC UHS-I Card lets you shoot more and transfer even faster. Quick read speeds of up to 170MB/s save you time when transferring high-resolution images and 4K UHD videos. Great for capturing 4K UHD video Ideal for recording outdoor adventures, weekend trips, or sporting events without skipping frames. With up to 400GB, the SanDisk Extreme PRO microSD 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 smartphone experience thanks to the SanDisk Extreme PRO microSD card’s A2 Specification. Durable design for use in extreme environments SanDisk Extreme PRO microSDHC and microSDXC 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 mobilemate USB 3.0 reader The MobileMate USB 3.0 microSD card reader with transfer speeds of up to 170MB/s, you can move big files fast, move a lot of files fast or just make frequent file transfers that much quicker. Key Features: Ideal for Android smartphones and tablets, and action cameras, and drones Up to 170MB/s read and 90MB/s write speeds for fast shooting and transfers Rated A2 for faster loading and in-app performance 4K UHD-ready with UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) Built for and tested in harsh conditions; temperature-proof, water-proof, shock-proof and x-ray proof Specifications - Includes SD Adapter - Transfer speeds: 64GB - 400GB, 170MB/s read and 90MB/s write