Guaranteed Lifetime warranty from Purchase Date and Free technical support based on United States.PCB Color may be different (Black or Green) due to different production batches all Timetec products are high quality and rigorously tested to meet stringent standards.Compatible for Apple Mac Mini - Mid 2011, Late 2012 – MacMini5,1 MacMini5,2 MacMini5,3 MacMini6,1 MacMini6,2.