The 64GB High Endurance Video Monitoring microSDXC Memory Card from SanDisk has been rated for a class 10 speed and offers a read and write speed of 20 MB/s. These speeds along with the 64GB storage capacity allow you to use this memory card for recording hours of Full HD videos in dash cams and home security systems. To help preserve your data, this memory card is protected against extreme temperature ranges, shock, water, and x-rays. Additionally, it is built for endurance and designed to keep functioning after 10,000 hours of Full HD recording. SanDisk even provides a microSD to SD adapter so that you can use this memory card with other devices such as digital cameras, computers, and more.