PNY Premier-X 256GB 100 MB/s 4K Ultra HD UHS-I microSDXC Flash Memory Card Description The PNY Premier-X 256GB UHS-I microSDXC Flash Memory Card delivers high-performance storage designed for capturing and streaming 4K Ultra HD video, with read speeds of up to 100MB/s. Rated UHS Speed Class 3 (U3) and Video Speed Class 30 (V30), it ensures smooth video recording and playback, while its A1 app performance rating supports faster app launches and improved responsiveness on mobile devices. With 256GB of storage, it offers ample space for videos, photos, and apps. Built for reliability, the card is shockproof, waterproof, temperature-proof, and magnet-proof, making it suitable for use in a variety of demanding environments. Ideal for smartphones, tablets, drones, action cameras, and more, it?s a dependable choice for users needing high-speed, high-capacity mobile storage.