The MICRON PC3L 12800S DDR3 Memory is a 4GB SO-DIMM memory module designed for computers and laptops. It operates at a bus speed of PC3-12800 (DDR3-1600) and is ideal for upgrading or replacing existing DDR3 SDRAM modules. With a total capacity of 4GB and a capacity per module of 4GB, this memory module is a reliable choice for increasing the performance and speed of your device.