SanDisk Extreme Pro Class 10 SDXC Card 256GB SDSDXXY-256G-GN4IN

Shot speeds up to 60MB/s, transfer speeds up to 150MB/s and other factors. 1 MB = 1,000,000 bytes. X = 150 kb/sec

Perfect for shooting 4K UHD video) and sequential burst mode photography

Capture seamless video with UHS Speed Class 3 (U3) and video speed Class 30 (v30) (2)

Manufactured and tested in harsh conditions) temperature proof, waterproof, shockproof, and x-ray proof