Model: DDR2 SODIMM Capacity: 2GB Frequency: 667MHz Working voltage: 1.8V Function: DDR2 200PIN Scope of application: Laptop Memory RAM pins: 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 The Recognition of XP is around 3GB The Recognition of Win 7 32Bit is around 2.26-4.5GB The Recognition of Win 7 64Bit is around 8-16GB Before purchasing RAM, please confirm which model is suitable for your Desktop or 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 Color: Green Material: PCB Size: 7 x 3cm Package Contents: 1 x Memory Note: Different batches of products may vary slightly. Color may be random and cannot be specified, but this does not affect functionality. The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3cm.