Electric Power: 85W; Input: AC 100-240v-1.5A 50-60Hz; Output: DC 18.5V-4.6A Replacement charger AC adapter for Apple MacBook Pro 13/15/17 inch (Before Mid 2012) Part Number: A1344, A1330, A1342, A1172, A1181, A1184, A1244, A1278,A1330 Note:This is the first generation of magsafe power adapter(L-Shape), not the second generation. 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 Replacement chargers manufactured with the highest quality materials and include multiple smart features safeguarding against IV - incorrect voltage, SC - short circuit, IO - internal overheating Its held in place magnetically, so if someone should trip over it, the cord disconnects harmlessly and your notebook stays put safely