About this item Wide Compatibility: Ideal for your smartphones, tablets, s, action cameras and Gopro. Premium memory solution for smartphones, tablets, or action cameras. 4K Ultra UHD: Quickly captures, plays back, and transfers media files, including 1080p Full-HD, 3D, and 4K UHD video. High Speed Memory : Leverages UHS-I technology for a transfer speed up to 100MB/s. Loads apps faster with A1-rated performance. (Based on internal test environment of Lexar, so the actual speed may vary with different host devices and environments. For devices that don't support UHS-I, the transmission speed will be different due to interface limitations.) Multi Capacity: Available in capacities ranging from 32GB to 512GB. The 128GB ro sd can support up to 6 hours 4K video, or up to 20 hours 1080P video, 37,600 photos, or 19,440 songs. (Due to different capacity algorithms and partial capacity are used for system files, management and performance optimization, so the actual available capacity may be less than the identifying capacity.) Ultra Durable: Waterproof, temperature-proof, shockproof, magnetic-proof.