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: The recognition of XP is around 3GB The recognition of Windows 7 32-bit is around 2.26-4.5GB The recognition of Windows 7 64-bit is around 8-16GB Before purchasing, please confirm which model is suitable 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 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 different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement error allowance is +/- 1-3 cm. Only the above package content is included; other items are not part of this sale.