Compactflash cf cfast card memory size 64 gb read speed 515 mbs write speed 240 mbs operating voltage 33 v series sandisk extreme pro suitable for full hd recording 4k recording 360 recording 3d recording sports photography manufacturers warranty lifelong standard cfast 20 video speed class vpg 130 adapter without adapter protective properties temperature resistant operating temperature 25 to 85 c dimensions 43mm x 36mm x 33mm