Item Weight - 1.81 Kg Product Dimensions - 9.5 x 13.8 x 0.6 inches Batteries - 1 Lithium Polymer batteries required. Item model number - MR972LL/A Screen Size - 15.4 inches Processor Brand - Intel Processor Type - Core i7 Processor Speed - 2.3 GHz Processor Count - 1 RAM Size - 16 GB Computer Memory Type - GDDR5 Hard Drive Size - 512 GB Graphics Card Ram Size - 4 GB Graphics Card Interface - AGP Operating System - Mac Lithium Battery Energy Content - 49.2 watt_hours Lithium Battery Packaging Batteries contained in equipment Lithium Battery Weight - 312 Grams Number Of Lithium Ion Cells - 1