DataMINE Premium Class 4 8GB MicroSD Flash Memory Card for RIM BlackBerry Curve 8530 , 9310 , Bold 9930 , Torch 9860 and Many More BlackBerry Phones! ** Includes Mini and Standard SD Adapters! ** 8 GB storage capacity - Class 4 - Guaranteed fast data transfer minimun rate 4 MB/ seconds Usable with an extremely wide range of devices that have Micro Secure Digital compatible w/ media slots Low battery consumption to maximize battery life in small portable devices. User-selectable mechanical write protect switch on the exterior card casing. 10 year warranty