UNMATCHED SPEED - Experience blazing-fast performance with up to 3700MB/s read and 3400MB/s write speeds, plus minimum sustained write speed of 3200MB/s, powered by PCIe Gen 4 interface. CAPTURE EVERY MOMENT - With a substantial 256GB capacity, this CFexpress 4.0 Type B card ensures you never miss a shot, providing ample space for high-resolution photos and videos. RUGGED DURABILITY - Designed to withstand the elements, this card is IP5X dust-proof, 5-meter drop-proof, and resists 70N of compression, ensuring your data remains safe in harsh conditions. EXTREME TEMPERATURE RESISTANCE - Operate confidently in extreme temperatures, from 10.4°F to 161.6°F (-12°C to 72°C), and store safely from -13°F to 185°F (-25°C to 85°C).