Combined shipping for multiple orders is ok. US based shipping for fastest service. Type: 200-Pin DDR2 SO-DIMM Capacity: 4GB Speed: DDR2 800 MHz (PC2-6400) Timing:CL6 Voltage: 1.8V Buffering/Ecc: Non-ECC Unbuffered Please be sure to do the research to confirm this memory module is compatible with your system.