The SanDisk 512GB Extreme PRO microSDXC card is a high-performance memory card designed for smartphones, action cameras, and drones. It offers fast read and write speeds of up to 200MB/s and 140MB/s respectively. The card is shock resistant, temperature proof, water resistant, and X-ray proof. It is compatible with the Zoom H4nPro/BLK portable 4-track recorder, offering fast offload speeds and A2 app performance. The recorder features built-in X/Y stereo microphones, adjustable between 90˚ and 120˚, as well as external stereo mic input and headphone output. The card and recorder are sold separately.