【 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. | 【After Sell Service】: This is the second generation of power adapter, not the first generation. Knowing which specific Laptop model you have is important.If for any reason you are not 100% satisfied with our 45W power adapter, please contact us, we will reply you within 24 hours.