4GB of capacity. Flash memory storage. High transfer speed. Compatible with any device that are SD enabled, as well as SDHC based devices. Has a protective lock-switch. Sliding the switch closed allows reading only. This protects data from accidental overwrite. Durable, compact design. For economical postage reasons the item is sent without retail packaging. Please Note: This is a generic blank card and does not contain any data such as navigation maps, it is being advertised as compatible with the models listed in the title but not of the manufacturer. This listing uses SD in the title as a short form to describe the Secure Digital format.