1. high-quality DRAM particles digital level detection performance is excellent 2. Adopt customized high-quality PCB high-density composite structure design without fear of high temperature and stand the test of time 3. High wear- electroplated gold finger and resistance and stable contact 4. High-quality memory materials and memory technology compatibility with domestic and foreign mainstream 5. Support operating systems to long-term stable operation of the system : Applicable type: notebook Memory type: DDRIII Memory frequency: DDR3 1600 Particle package: BGA Memory capacity: 4GB size: 6.9 x 3.0cm Material: plastic colour: black Package Contents: 2 x DDR3 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.