The Eye-Fi Card technical specifications are as follows:

• Wi-Fi Security: Static WEP 64/128, WPA-PSK, WPA2-PSK
  Note: Shared WEP and Apple’s version of WEP TSN are not supported.
• 802.11 g/n protocol support on the 2.4GHz band. Note: 5 GHz band not supported
• Typical Range: 90 feet (27 m) outdoors and 45 (13 m) feet indoors
• Storage Capacity: 2.0GB, 4.0GB and 8.0GB (1GB is defined as 10^9 Bytes)
• Power: advanced power management optimizes use of camera battery
• Card Dimensions: SD standard 32mm x 24mm x 2.1mm
• Card Weight: 0.1oz.