Eye-Fi Connect X2, 4GB. Internal memory: 4096 MB, Flash card type: Secure Digital High-Capacity (SDHC). Security algorithms supported: 128-bit WEP, 64-bit WEP, WPA-PSK, WPA2-PSK. Mac operating systems supported: Mac OS X 10.5 Leopard, Mac OS X 10.6 Snow Leopard, Bundled software: Eye-Fi Center. Colour of product: Orange. Minimum hard disk space: 100 MB