There's nothing worse than running out of space when you're recording something you really like. Say goodbye to the frustration with 64GB of convenient capacity. How Fast Do They Work? Not only do they hold a lot of information, but they are also quick when it comes to helping it be processed. They can transfer at the rate of 80MB/s. This means that every second, 80 megabytes of information can go through these cards. That's way more than you need to record video on your phone, so you have the room you need and a little extra headroom on top of that. How Is the Quality of the Recording? With the SanDisk Ultra 64GB microSDXC UHS-I Card with Adapter, you are getting high-quality recording every single time. They support class 10, A1, full HD video recording. With this capability, you can capture images and video that are cinema-quality and crisp and clear. You can shoot anything from a fun moment on the beach to your own mini-documentary, making your phone or tablet the director's camera. Packed with Extra Features These tough chips are also waterproof, so you don't have to worry about them being ruined if they get splashed or dropped in a bit of water. They are also temperature-proof, which means you don't have to be concerned if your phone or tablet gets a little too hot or too cold. They will stand up and continue to perform. Additionally, they are shock-proof, so if you drop them, they are not going to break apart, or if your device is dropped, your storage is going to survive. If you go through the airport, it's totally OK to have your devices scanned, even with this inside, because X-rays will have no effect on your precious data and recordings. You also don't have to worry about what will happen if a magnet pushes up against it because the SanDisk Ultra 64GB microSDXC UHS-I Card with Adapter resists those as well. You're completely covered.