The Lexar 633x 64gb Micro SDXC Card is designed for your sports camcorder, tablet, or smartphone, this card makes it easy to quickly capture play back, and transfer 1080p full-HD, 3D, and 4K video, as well as the highest-quality movies, photos, and songs. These high-capacity, Class 10 cards leverage UHS-I technology to deliver high-speed performance?up to 633x (95MB/s). The cards also come with a USB 3.0 reader for high-speed file transfer. These premium memory solutions give you the speed and space you need to capture more adventure on the go. Get more from your device. The cards are speed rated at Class 10, and leverage UHS-I technology to deliver a transfer speed up to 633x (95MB/s).* These premium memory solutions give you the speed and capacity you need to capture, transfer, and share more adventures on the go. Quickly transfer files with included reader. The cards also include a USB 3.0 reader to quickly and easily transfer files between your devices. All Lexar memory card, card reader, and USB flash drive product designs undergo extensive testing in the Lexar Quality Labs, facilities with more than 1,100 digital devices, to ensure performance, quality, compatibility, and reliability.