The card is aimed at professionals who want to streamline their workflow. Also: Best cameras With modern cameras capturing high megapixel images and 4K video, there’s a demand for high performance. The UHS-II technology offers write speeds up to 180MB/s, and is rated UHS Speed Class 3 (U3) and Video Speed Class 60 (V60), bringing professional grade performance to DSLR and mirrorless cameras. The 1800x is waterproof, temperature-proof, shockproof, vibration-proof, and X-ray-proof. The cards are also backwards compatible with UHS-I devices, with performance being at the top end of what UHS-I devices are capable of delivering.