Strontium Nitro A1 micro SD SDHC and SDXC memory card series, a new member to the Strontium Nitro family with up to 100MB/s transfer speed ranged from 32GB to 256GB capacities. With A1 rated performance in the UHS-I U3 (U1 for 32GB) Class 10 specification, not only delivering a faster App performance, it also allows full HD video recording as well as high resolution photo capturing. It is an ideal storage solution to your Android smartphone, tablet, camera, action cam, dash cam, drone, gaming console and etc. With Strontium's 4-Proof Technology, the Strontium Nitro A1 micro SD SDHC and SDXC memory card is designed to last even against water, shock, magnet and x-ray. Backed by Strontium Lifetime Warranty.