Fan Included: No, Memory Series: APPLE SODIMM, Memory Type: DDR4, Memory Size: 16GB (2 x 8GB), Tested Latency: 18-18-18-43, Tested Voltage: 1.2V, Tested Speed: 2666, SPD Latency: 18-18-18-43, SPD Speed: 2666MHz, SPD Voltage: 1.2V, Speed Rating: PC4-21300 (2666MHz). CORSAIR Mac Memory is specifically engineered and rigorously lab-tested at high stress levels and temperatures to guarantee compatibility and optimal performance on Mac systems.