Otterbox Defender Black/Black Case and 4GB MicroSDHC Class 4 Memory Card with SD Adapter for Blackberry Curve 8300 8310 8320 8330 OtterBox Case offers 3 layers of protection OtterBox Case allows you to charge & sync through the case This Kingston 4GB microSD High Capacity card offers higher storage along with the versatility of transforming the card into full-size SD card. Kingston's microSD cards use the new speed "class" rating of Class 4 that guarantee a minimum data transfer rate of 4MB/sec. for optimum performance with devices that use microSD.