The Kingston Memory 1GB KTL-TP667/1G is a 1GB SO-DIMM module designed for laptops. With a bus speed of PC2-5300 (DDR2-667), this unit is perfect for upgrading or replacing memory modules in Lenovo FRU 40R3389 laptops. Made by Kingston, a trusted brand in memory technology, this RAM is reliable and efficient for enhancing the performance of your device. Upgrade your laptop with this high-quality memory module for improved speed and efficiency in your computing tasks.