About this item Safe and Efficient voltage: Input: 100-240V 50/60 Hz Output: 14.85V 3.05A (45W T-Tip). Compatible models: Compatible with Mac book Air (11-13inch, mid 2012)(11-13-inch, mid 2013)(11-13-inch, early 2014)(11-13-inch, early 2015)(13-inch, 2017), Part number: A1465, A1466, A1436, A1435. LED Indicator: An amber light lets you know that your notebook is charging, while a green light tells you that you have full charge. Safety quality: With built-in safeguards to protect against short circuiting, overcharging, overheating and auto recovery. Size: 5.16 x 4.33 x 1.46 inches.