Brand: Kingston - Model: KTA-MB800K2/4G - Type: 200-Pin DDR2 SO-DIMM - Compatibility: Apple-Imac Intel Core 2 Duo 20-24 inch 2.4-3.06 GHZ - Capacity: 4GB (2 x 2GB) - Speed: DDR2 800 (PC2 6400) - Voltage: 1.8V - Heat Spreader: No