Lenovo 4GB D31600 M2 (1100682) is a memory module for adding RAM to a compatible computer. It provides 4 GB of memory in one module, a straightforward capacity for systems that use this memory specification.
The module uses DDR3 memory running at 1600 MHz. These details identify its memory generation and clock speed, so it can be matched against a system’s requirements. The listing confirms the capacity and memory type, but does not establish compatibility with particular computer models or describe package contents.