The SanDisk Extreme PRO SDHC™ UHS-I Card is designed to meet the demanding needs of professional photographers and videographers using DSLR and mirrorless cameras. With transfer speeds of up to 170MB/s, you can quickly transfer high-resolution images and 4K UHD videos without any lag. The UHS Speed Class 3 (U3) and Video Speed Class 30 (V30) ratings ensure smooth, uninterrupted 4K video recording and playback. The card is shockproof, temperature-proof, waterproof, and X-ray-proof, so you can confidently take it with you on any shooting adventure. With capacity options of up to 256GB, you'll have plenty of storage space for all your creative work.