The Angelbird AV Pro CFexpress v4 Type A Memory Card in Black is the ultimate card for professionals, offering double the speed of the SE model and 512GB of capacity. This future-proof card provides fast file offloading, perfect for Sony users capturing high-data video, stills, and 8K plus RAW bursts.Exceptional Speed and Premium ConstructionExperience consistent write speed of 800 MBps and 1700 MBps read speed throughout recording (not just at the beginning). Capture high-res data without any lagging. Built to last, this card is extreme temperature, water, dust, shock, x-ray, magnetic, ESD, and overload proof. Sure to resist what your production game throws at it. Angelbird’s Stable Stream technology ensures uninterrupted read and write performance across the entire capacity. Never worry about a frame drop. When your camera’s battery is low or loses power, the Host Power Loss Protection saves buffer files and safely shuts down the card to avoid any losses. This card operates with as minimal power draw as possible. Engineered to keep your camera battery alive as long as possible. Angelbird’s Advanced Thermal Management feature protects the card from overheating by going into a low power safe mode when it’s not in use.