The Micron MTA18ASF2G72PF1Z-2G6V21 16GB 1Rx4 NN4-2666V NVDIMM-N Memory Module is a high-performance memory module designed for demanding server and workstation applications. Here's a breakdown of its key specifications:  

• Manufacturer: Micron
• Part Number: MTA18ASF2G72PF1Z-2G6V21
• Capacity: 16GB
• Type: DDR4  
• Speed: 2666 MHz
• ECC: Yes (Error Correction Code)
• Rank: 1Rx4   
• NVDIMM-N: This indicates that it's a Non-Volatile Dual In-line Memory Module, meaning it retains data even when the system is powered off.