Sandisk Extreme A2 400GB Micro SD Memory Card with Adapter SanDisk Extreme A2 microSDXC cards are fast for better pictures, app performance, and 4K video. Ideal for Android smartphones & tablets, action cameras and drones, these A2-rated cards load large apps and record 4K video with no lag. The super-fast SanDisk Extreme microSDXC memory card reads up to 160MB/s and writes up to 90MB/s. With 256GB storage, you have the capacity to take more pictures and Full HD / 4K video for exceptional smartphone experience. Built to perform in harsh conditions, SanDisk Ultra microSD cards are waterproof, temperature proof, shockproof, and X-Ray proof. The microSD card is rated Class 10 / I / U3 / A2 and has a 10-year warranty. Reasons to buy Sandisk Extreme A2 400GB Micro SD Memory Card with Adapter Genuine Sandisk Memory Card 400GB storage Class 10 / U3 speed with A2 smartphone app rating 10 year Sandisk warranty Includes standard SD size adapter