E-films MxR Extreme Expresscard Adapter for Sony EX1, EX3, EX1R & PMW-350 MxR Extreme Expresscard Adapter for Sony EX1/EX3/EX1R/PMW-350: The E-film MxR Extreme is a custom designed and purpose built USB Expresscard that supports all brands and sizes of SDHC/SDXC including the very latest UHS interface memory Replaces SxS Pro: The E-films MxR Extreme adapts SDHC/SDXC and UHS memory to replace Sony SxS Pro memory in the Sony range of EX cameras Speeds up downloads: Downloading UHS based memory to computer using the E-films MxR Extreme is 35+ megabytes per second in a real world environment and compare favorably to SxS which is approximately 75 megabytes per second All under/overcranking speeds supported: Recording is flawless from 1-60 frames per second, the same as SxS Pro Unlimited recording: Sony released a 64GB SxS-1 Pro card, which is surpassed by the combination of the E-film MxR Extreme and the Lexar 128GB card