4GB Total memory using 1pc of  4GB  PC2-6400 DDR2-800 CL6 16c 128x8 200p SDRAM SODIMM.
Lifetime warranty for exchange. 
We don't use Generic modules to avoid incompatibility issues. 
Guaranteed to work or you get all of your money back including shipping.

MAX MEMORY 8GB
SOCKETS 2
64 BIT OPERATING SYSTEM REQUIRED
Features
Compatible with Dell Inspiron 400 (Zino HD)