FeaturesCapacity: 64 GBUHS Speed Class 1Read speed: Up to 95 MB/sWrite speed: Up to 25 MB/sTemperature resistant, waterproof, shock proof, X-ray proof & static proofWant to save space on your mobile device by running apps from a memory card? The Transcend 300S 64GB UHS-I U1 Class 10 MicroSD Card with Adapter is the right choice! Compliant with the latest speed class, the cards boast excellent random read/write speed, perfect for retrieving small pieces of data from random locations and speeding app launch time.A good fit for mobile app storageIts common for users to install and run mobile apps from microSD cards in order to free device memory. Random read/write performance is thus crucial. Transcend\'s microSDXC/SDHC 300S memory cards are a great fit for storing mobile apps.Built for extremesTo deliver the best performance and stability, Transcend\'s microSD memory cards are tested to withstand extreme conditions. They are temperature resistant, waterproof, shock proof, X-ray proof, and static proof.