SDXC card for professional users. Read speed: 280 MB/s, Write speed: 210 MB/s. Speed class: Class 10, U3, UHS-II, V60. Waterproof, temperature-resistant, shockproof, vibration-resistant, and X-ray safe. Enables fast capture and transfer of high-quality photos and videos. Suitable for Full HD and 4K video recording. UHS-II bus system. SD cards with UHS-II standard offer up to 312 MB/s in compatible devices. Like UHS-I, there are UHS speed classes: U1 for Full HD videos and U3 for 4K videos. UHS-II supported memory cards are backward compatible and can be used in devices without UHS support (with limited performance). Speed Class 10. The Speed Class indicates the minimum continuous data transfer rate when writing video files to a memory card. The Speed Class number indicates the transfer rate in megabytes per second. Class 2 cards are designed for a minimum continuous transfer rate of 2 MB/s, while Class 10 cards are for a minimum continuous transfer rate of 10 MB/s. The speed classes are divided into classes 2, 4, 6, and 10. For Full HD video (1080p), at least Class 6 is recommended.