Actual Items manufactor or Batch NumberFull Tested.Before ShippingModel:DDR2 SODIMMCapacity:4GBFrequency:800MhzFunction:DDR2 200PINScope of application:laptopPins of MemoryDDR for Desktop=184 pinsDDR for Laptop=200 pinsDDR2 for Desktop=240 pinsDDR2 for Laptop=200 pinsDDR3 for Desktop=240 pinsDDR3 for Laptop=204 pinsBefore purchasing , 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 1066MHZDue to different batches, the appearance, color, and printing of the product , which does not affect its use.Colour:GreenMaterial:PCBSize:7x3CMPackage Contents:1 * MemoryOnly 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.