Actual Items manufactor or Batch Number may varyFull Tested.Before ShippingModel: DDR2 SODIMMCapacity: 4GBFrequency: 800MhzFunction: DDR2 200PINScope of application: laptopPins of Memory RAMSDDR for Desktop=184 pinsDDR for Laptop=200 pinsDDR2 for Desktop=240 pinsDDR2 for Laptop=200 pinsDDR3 for Desktop=240 pinsDDR3 for Laptop=204 pinsRead FirstThe Recognition of XP is around 3GBThe Recognition of Win 7 32Bit is around 2.26-4.5GBThe Recognition of Win 7 32Bit is around 8-16GBBefore purchasing rams, please confirm which model is suitable for your Laptop, usual models are as bellow:PC2 4200 = DDR2 533MHZPC2 5300 = DDR2 667MHZ (Compatible with DDR2 533MHZ)PC2 6400 = DDR2 800MHZ (Compatible with DDR2 667MHZ, DDR2 533MHZ)PC2 8500 = DDR2 1066MHZThe appearance and color of different batches of products may be different, which will not affect the useColour:greenMaterial: PCBSize:7 x 3cmPackage Contents:1 x RAMOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.