This is a late 2010 MacBook Air 13" model with an upgraded 4GB memory. Processor: Intel core 2 duo Processor Speed: 1.86GHz Memory: Upgraded to 4GB Battery life: Recommended to service battery. Keyboard: The 'm', ',' and '.' keys are unresponsive (although sometimes, they do work). You can enable Mac OS X screen keyboard, or just use an external keyboard. Everything else is good working condition. Full set, with charger accessories in original box.