Incredibly compact, the MSH-M128A Memory Stick Duo media is ideal for use in small digital devices, including cellular phones, portable audio players and pocket-sized digital imaging devices. It features a large 128 megabytes storage capacity with 123 megabytes available1, perfect for digital snapshots and MP3 audio. By attaching the included adapter it can also be used in most products that use standard Memory Stick and Memory Stick PRO