About this item Universal Charger: AC 100-240V 50-60Hz, Output: 14.85V 3.05A 45W. Knowing what specific Mac model you have is important. Please check out carefully before purchasing. 45W T-Tip Charger: Replacement charger with a T-tip shape connector for Mac Air 11' and 13.3' after 2012, compatible with models: A1435, A1465, A1466. Compatible with MacBook: Compatible with Mac Air 11 and 13.3: MD223, MD224, MD231, MD232, MD711, MD712, MD760, MD761, JVM2, JVP2, JVE2, JVG2, MQD32, 42, 52. LED Status Alert: An amber light indicates that your MacBook is charging but not fully charged, and a green light indicates that it is fully charged. Dimensions: 5.87 x 4.65 x 1.81 inches.