Actual Items manufactor or Batch Number Full Tested.Before Shipping Model:DDR2 SODIMM Capacity:4GB Frequency:800Mhz Function:DDR2 200PIN Scope of application:laptop Pins of Memory 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 Before purchasing , please confirm which model is suitable for your Laptop, usual models are as bellow: 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 Due to different batches, the appearance, color, and printing of the product , which does not affect its use. Colour:Green Material:PCB Size:7x3CM Package Contents: 2 x Memory Only 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.