specifications Rseries- ThinkPad R61i StorageOptical drive CD-RW/DVD Hard drive features Standard 110GB hard drive sizes VideoDisplay 15.4-inch WXGA TFT (1280 x 800 resolution) TFT display Software Operating system Windows 7 Professional (32 bit) Installed Memory (RAM) 2.00 GB Battery Need to be replace. PowerAC Adapter Lenovo Genuine AC adapter (90 W)  Input is 100/240 V ac, 1.5A, 50/60 Hz Output is 20 V dc, 4.5 A Processor Intel(R) Core(TM) Duo CPU T5250 @ 1.50GHz 1.50GHz CON: NEED BATTERY Please look at all photos!No original box will be provided. They are of the actual item and will have any measurements in them! We want you to be happy and see exactly what you are getting! Some new items will be opened to get photos and check contents! We try to provide the best description and photos as possible. We want you to be happy with purchasing from us! See our Feedback!  The item may present some make of scratches or wear on them, no big deal. For more accurate details, we took pictures of every corner of the item please take a time look and read all info on them. ASK ANY QUESTIONS REGARDING THE ITEM BEFORE PURCHASING TO ENSURE A SMOOTH TRANSACTION.The box as some tears and blemish due poor storage condition and aging. INTERNATIONAL BUYER PLEASE WAIT FOR THE INVOICE BEFORE PAYING FOR POSSIBLE EXTRA SHIPPING FEES. Disclaimer for ALL sales: It's a pre-owned item and is being sold AS IS. If you have any questions concerning about this item, feel free to contact us. We describe our items to the best of our ability and try to incorporate as much research as possible with books and internet, however, we are not experts in any field.  You'll be buying exactly what’s pictured, so please look carefully BEFORE you purchase.