Product Description: Sony flash memory card - 4 GB - MS PRO DUO, Product Type: Flash memory card, Storage Capacity: 4 GB, Form Factor: Memory Stick PRO Duo, Supply Voltage: 2.7 - 3.6 V, Included Memory Adapter: Memory Stick Duo adapter, Boxed-product Weight: 454 g, Item model number: MSXM4GSX, ASIN: B000GYLI1K