Designed to last, the SanDisk High Endurance microSD UHS-I card gives you the peace of mind that your dash cam and home monitoring security system will capture crucial footage when it happens, recording and re-recording worry-free. With capacities of up to 64GB, you can record and save more Full HD or 4K videos. It's built tough, too: it records in extreme heat or freezing cold, plus it's shock proof, water proof and humidity proof. (1GB = 1,000,000,000 bytes. Actual user storage less. Card only. See product packaging and official SanDisk website for more information and limitations. Compatible device required. Full HD (1920x1080) and/or 4K UHD (3840x2160) video support may vary based on host device, file attributes, usage conditions and other factors. See HD page on official SanDisk website.