The module is manufactured by the Korean company SK Hynix, and its specifications are as follows: • Type: DDR3 (3rd generation). • Form Factor: SO-DIMM (designed for laptops). • Capacity: 4GB (based on the number of chips and their common distribution in this model). • Speed: Likely 1333MHz (also known as PC3-10600S) or 1600MHz (PC3-12800S). • Voltage: Operates at 1.5V (Standard Voltage). 2. Compatibility with your device (LG LGR58 / R580): • Result: Fully compatible. • Your device supports DDR3 memory and has two slots. • Maximum capacity supported by the device: You can install two modules to reach a total capacity of 8GB (4GB + 4GB).