Capacity Single Module 16GB Speed up to 2666MHz Non-ECC Unbuffered 288-Pin 1.2V UDIMM. Specs Black PCB Color and Dual Rank (2Rx8). Compatibility Designed for selected DDR4 Desktop PCs and workstations that support 288-Pin UDIMM memory. NOT compatible with Laptop SODIMM slots. Installation Plug-and-Play Upgrade, Quick and Easy to Install, no expertise required (please refer to your system's manual for guidelines). Warranty All Timetec products are high-quality and rigorously tested to meet stringent standards. Backed by Timetec Limited Lifetime Warranty and professional technical support based in the United States.