The 60 Watt Power Adapter features a magnetic DC connector that ensures your power cable will disconnect if it experiences undue strain and helps prevent fraying or weakening of the cables over time. In addition, the magnetic DC helps guide the plug into the system for a quick and secure connection. * Compatible Part Numbers: A1172, A1181, A1184, MA538LL/A, 661-0443, 661-4269, 661-4485, 661-4259, 661-4339; * Fits Laptops: * MacBook: 13" Core Duo, Core Duo, Late 2006 Core 2 Duo, Late 2007, Mid 2007 Core 2 Duo, 13.3-inch, Black Santa Rosa, White Santa Rosa, * Apple MacBook: MA254LL/A, MA255LL/A, MA472LL/A, MA699LL/A, MA700LL/A, MA701LL/A, MB061LL/B, MB062LL/B, MB063LL/B, MB061LL/A, MB062LL/A, MB063LL/A;