Input AC V 1.5A Hz Output DC 14.85V 3.05 A 45W.Fully compatible with for Apple MacBook Air 13inch MacBook Air 11inch Early MacBook Air 13inch Early MacBook Air 11inch Early MacBook Air 13inch Early MacBook Air 11inch Mid MacBook Air 13inch Mid MacBook Air 11inch Mid MacBook Air 13inch Mid Part Number A A A A.NoteThis is the second generation of Magnetic power adapterTShape not the first generation.Macbook air charger design with LED light provides charging statusRedCharging Greenfully charged.Builtin IC chip technology provides overload / short circuit protection / overload protection / heat protection. We test each charger to ensure a tight strong magnetic connection.The Magnetic DC connector makes it easy to disconnect the cord harmlessly and your MacBook Air stays put safely.It also helps prevent fraying or weakening of the cables over time.