Apple MacBook Pro MC371LL A 15.4" Intel Core i5 520M 2.40GHz 4GB 320GB Mac OS X v10.8 Mountain Lion Size:15.4" Memory Configuration 2 x 2GB Memory Configuration 2 x 2GB Memory Speed MHz 1333MHz Memory Speed PC3 10600 Memory Type DDR3 Mouse Type HP mouse Operating Systems Windows 7 Home Premium 64 Bit Optical Drive Class DVD SuperMulti Optical Drive Type Supermulti Slimslot DVD drive with LightScribe drive Optical Drives Included 1 Orientations Allowed Vertical PCI Express Slots (Available) 1 PCI Express Slots (Total) 1 PCI Express X1 Slots (Available) 0 PCI Express X1 Slots (Total) 2 mini x1 slots Platform PC Power Supply Type 100V 240V Power 200 Watt Processor Brand AMD Processor Class Athlon II X2 Processor Number 235e Processor Speed 2 Features: Backlight Pointing Device TouchPad with Multi Touch Control Battery Lithium Ion Providing up to 4 Hours per Charge (2670mAh) Power Requirements Not Specified By Manufacturer Dimensions (WxHxD) 13 Two Finger Scrolling Battery Built In Lithium Polymer Providing up to 9 Hours per Charge (77 Wh) Power Requirements AC: 100 240 VAC 1x Combo Analog Line In Optical Digital Audio In Expansion Slots None Flash Media Slot 1x SD Communications Network 10 100 1000 Mbps Gigabit Ethernet (RJ 45) Modem None Wi Fi 802