Full Details from Amazon.com : http://www.amazon.com/gp/product/B00D6Q2Z4O?tag=onigi-20
4GB 2x2GB RAM MEMORY HP Compaq Tablet PC tc4400 Laptop
Could be Samsung Kingston Hynix Smart Corsair Elpida Micron or Nanya
Warranty LIFETIME WARRANTY
Will Ship WorldWide from United States
2 of the 2gb ddr2 5300 Sodimms
