GPK Systems Car Charger for Macbook and 13-inch Macbook Pro 60watt Power Adapter Portable Charger Laptop Notebook Power Supply Cord Plug Input: DC 11.5V - 16V Output: 16.5V 3.65A 60 Watt LED indicator shows you when your computer is charging and when it is fully charged SERVICE & SUPPORT 1 YEAR WARRANTY Compatible only with Macbook and 13-inch Macbook Pro featuring power port.