Technical data: input: 100 ~ 240V - 50 Hz output: 20V performance: 4.25 a connector: Magnetic MagSafe 2, 5 -PIN Suitable for: A1424 Apple MacBook Pro Retina 2012 - 2015 Apple MacBook Pro A1398 (Retina / 15 Customs / mid -2015) Apple MacBook Pro A1398 (Retina / 15 inch / mid -2014) Apple MacBook Pro A1398 (Retina / 15 inch / end of 2013) Apple MacBook Pro A1398 (Retina / early 2013) Apple MacBook Pro A1398 (Retina / Mid -2012) Apple MacBook Pro (Retina 15 " / mid -2015) Apple MacBook Pro (Retina 15" / mid -2014) Apple MacBook Pro (Retina 15 " / end of 2013) Apple MacBook Pro (Retina 15" / early 2013) Apple MacBook Pro (Retina / Middle 2012) buy our tested power supplies with load current limitation, temperature protection and overflow protection for your Apple notebook. We offer you maximum security at a fair price for high-quality workmanship and top quality.