Wireless Internet-Ready Dell Latitude E6400 Laptop CD-RW/ DVD +/-RW, 4 GB Memory, 320 GB HD, Win 7 Pro. 14.1" WXGA Screen, 2.4GHz Intel Core i5 Processor 4GB DDR3 Memory, 320GB HD, DVDRW, WiFi Microsoft Windows 7 Professional 64-Bit Installed Comes with New 90W AC Adapter and Power Cord Battery holds a charge for approx 3-4 hours of normal use.