FeaturesCF Type I size adapter – 3mm thickSDIO and SD3.01 SpecSD / SDHC / SDXC card compatibleUHS-I compatibleLBA48 compliant to work with 256Gb+ cardsMaximum 25Mb/s transfer speedCompatibilityReported to work ok in 1st/2nd Gen iPod MINIReported to work ok in 4th Gen iPods (Photo too)Reported to work in various iRiver models with suitable adapters (unsupported)