DDR3L 1866MHz PC3-14900 204 Pin Unbuffered Non-ECC 1.35V CL13 Single Rank 1Rx8 based 512x8 Module Size: 4GB Package: 1x4GB ; JEDEC standard 1.35V, this is a dual voltage piece and can operate at 1.35V or 1.5V PCB Color may be different (Black or Green) due to different production batches; all Timetec products are high quality and rigorously tested to meet stringent standards For DDR3 Laptop Notebook PC Computer Compatible with Intel and AMD CPU, Not for Desktop Guaranteed Lifetime warranty from Purchase Date and Free technical support based on United States