The delkin 64gb 1900x ush ii sdhc memory card boasts a write speed of over 100mbs and read speeds of up to 285mbs it is designed to record full hd 4k raw footage without corruption or dropped frames ideal for fast shooting the quick write speed will ensure that data is written swiftly to the card so that you never miss a moment additionally it is waterproof shockproof and x ray proof and utilises built in error correction and wear levelling