Portégé 4000 Series 802.11b WiFi Integrated Wireless LAN as Standard Bluetooth Integrated as Standard Support for up to 1GB Memory Magnesium alloy casing SD (Secured Digital) card slot Full Size Keyboard Common SelectBay to allow various optical devices as well as an extra HDD, or an additional battery (up to 9.4 hours of use). Common Advanced Port Replicator Strong balance between functionality and weight - only 1.72Kg (with space saver)