Brand: RadioShack. MPN: 4401151. U3 V30 Rating: Guarantees smooth, uninterrupted recording and playback of 4K UHD videos.   High Compatibility: Perfect for use with smartphones, tablets, action cameras, drones, and other devices requiring high-speed storage.   Robust Durability: Waterproof, static-proof, X-ray-proof, shock-proof, and temperature-proof, ensuring your data remains safe in any condition.   Ultra-Fast Performance: Achieve transfer speeds up to 100MB/s, ideal for 4K UHD video recording and high-resolution photography.