Part#: LX.V5M03.039 Operating System: Windows 7 Professional 32-bit/64-bit Dual Hotload Optical Drive Type: DVD-RAM/±R/±RW Chipset: Intel HM65 Resolution: 1366 x 768 Memory Speed: DDR3 1066 WLAN: 802.11b/g/n Wireless LAN Battery: 6-cell lithium ion