Actual Items Manufacturer or Batch Number Fully Tested Before Shipping Model: DDR2 SODIMM Capacity: 4GB Frequency: 800MHz Function: DDR2 200-Pin Scope of Application: Laptop Memory Pin Count: DDR for Desktop = 184 pins DDR for Laptop = 200 pins DDR2 for Desktop = 240 pins DDR2 for Laptop = 200 pins DDR3 for Desktop = 240 pins DDR3 for Laptop = 204 pins Read First: XP System Recognition is around 3GB Windows 7 32-Bit Recognition is around 2.26-4.5GB Windows 7 64-Bit Recognition is around 8-16GB Before purchasing, please confirm the compatible model for your laptop. Common models are as follows: PC2 4200 = DDR2 533MHz PC2 5300 = DDR2 667MHz (Compatible with DDR2 533MHz) PC2 6400 = DDR2 800MHz (Compatible with DDR2 667MHz, DDR2 533MHz) PC2 8500 = DDR2 1066MHz The appearance and color of different product batches may vary, but this does not affect performance. Color: Green Material: PCB Size: 7 x 3 cm Package Contents: 1 x RAM Module Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed is +/- 1-3 cm.