Features Read Speed: up to 205MB/s Write Speed: 64GB up to 100MB/s, 128GB-256GB up to 140MB/s 4K, U3, V30 built to record burst photos without missing a shot and smoothly shoots up to 60 FPS ultra-HD video wear proof, temperature- proof, x-ray-proof, vibration-resistant, magnetic-proof, shockproof, and drop-proof