Mac Book Air Charger Power: Input: 100-240V 50/60 Hz Output: 14.85V 3.05A (45W T-Tip).Knowing what specific Mac model you have is important.Please check out carefully Before Purchasing. Compatible models: Mac Air Charger for Macbook air Part Number:A1465 A1466; Mac Book Air (13-inch, Mid 2012); Mac Book Air (11-inch, Mid 2012); Mac Book Air (13-inch, Mid 2013); Mac Book Air (11-inch, Mid 2013); Mac Book Air (13-inch, Early 2014); Mac Book Air (11-inch, Early 2014); Mac Book Air (13-inch, Early 2015); Mac Book Air (11-inch, Early 2015); Mac Book Air (13-inch, 2017)