Description Product Name: SanDisk Extreme Pro MicroSD Card With Adapter (170MB/s) OVERVIEW: Fast enough to keep up with the action: Get extreme speeds from a microSDXC memory card for fast transfer, app performance, and 4K UHD. Ideal for your Android smartphone, action cameras or drones, this high-performance Extreme Pro microSD SDXC card does 4K UHD video recording, Full HD video, and high-resolution photos. Super-fast SanDisk Extreme PRO microSDXC memory card achieves read speeds up to 170MB/s and writes up to 90MB/s. Plus, it’s A2-rated, so you can get fast application performance for an exceptional smartphone experience. Improve your workflow efficiency: With SanDisk QuickFlow Technology, this card optimizes performance for timesaving media offloads with quick read speeds up to 170MB/s (64GB - 1TB). Pair with the SanDisk Professional PRO-READER SD and microSD to achieve maximum speeds (sold separately). 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 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 microSD UHS-I card lets you capture uninterrupted 4K UHD2 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. SPECIFICATIONS: Capacity: 256 GB Compatibility: Compatible with microSDHC, microSDXC, microSDHC UHS-I, and microSDXC UHS-I supporting host devices Dimensions (L x W x H): 10.92mm x 14.99mm x 1.02mm Perfomance - (256 GB): Sequential Read Performance: Up to 170MB/s, Sequential Write Performance: Up to 90MB/s Product Numbers - 256 GB: SDSQXCZ-256G-GN6MA