This is a matching, lightly used (like new) 8GB kit (two 4GB modules) of Hynix DDR3 laptop memory. This standard 1.5V dual-rank PC3-12800S RAM is ideal for upgrading legacy laptops, small form-factor desktops, or older micro-nodes that utilize DDR3-1600 memory. Both sticks are identical manufacturer part numbers to ensure stable dual-channel operation. Please verify your system's motherboard requires standard DDR3 (1.5V) and not low-voltage DDR3L (1.35V) prior to purchase.