Model: DDR2 SODIMM Capacity: 4GB Frequency: 800MHz Function: DDR2 200PIN 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 Note: - The actual item's manufacturer or batch number may vary. - The appearance and color of different batches may vary and will not affect performance. - Color is random; specific color requests cannot be accommodated. - Compatibility information: 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 System Recognition Notes: - Windows XP may recognize up to approximately 3GB - Windows 7 32-bit may recognize between 2.26GB to 4.5GB - Windows 7 64-bit may recognize between 8GB to 16GB Before purchasing, please confirm the compatible model for your laptop. Material: PCB Size: 7 x 3 cm Package Contents: 1 x RAM Module Note: Light and display settings may cause slight color variations from the actual product. Measurement error allowed is +/- 1-3 cm. Only the items listed above are included.