Size and weightHeight: 0.98 inch (2.50 cm) Width: 15.47 inches (39.3 cm) Depth: 10.51 inches (26.7 cm) Weight: 6.6 pounds (2.99 kg)1 Connections and expansionMagSafe power port Gigabit Ethernet port One FireWire 800 port (up to 800 Mbps) Three USB 2.0 ports (up to 480 Mbps) Mini DisplayPort Audio line in Audio line out ExpressCard/34 slot Kensington lock slot CommunicationsBuilt-in AirPort Extreme