Service: customer service can solve the problem online 24 hours a day. If there is a problem with your charger, we will solve it as soon as possible. LED LIGHT PROVIDES STATUS INFO: An amber light lets you know that your notebook is charging, while a green light tells you that you have a full charge. Compatible with Mac Book laptops: Suitable for laptop power supply models: A1425, A1435, A1502, A1466, A1436, A1465. Compatible with Mac book Pro 13 inches: MGX72, MGX82, MGX92, MF839, MF840, MF841, MF843, MD212, MD213, MD662, ME864, ME865.ME866. Compatible with Mac Book Air 11 inches and 13.3 inches: MD223, MD224, MD3231, MD217, MD172, MD760, MD761, MJVM2, MJVP2, MJVE2, MJVG2, MQD32, 42, 52. Replacement charger power adapter for Mac Pro 13" after 2012 with Model:A1425、A1502. Input: AC 100-240V, 50-60Hz; Output: DC 16.5V-3.65a;Second generation of power adapter,The T-tip connector.