4GB ( 1x 4GB Module ) DDR4 2400 MHz ( PC4-19200 ) DDR4 SODIMM ( 260-Pin ) Non-ECC SODIMM ( Unbuffered SO-DIMM ) 1.2V - DDR4 Standard Voltage Compatible Equivalent for Hynix HMA851S6AFR6N-UH, HMA851S6CJR6N-UH, HMA851S6DJR6N-UH High performance Memory RAM upgrade designed for Laptop/Notebook/All-in-One Computer Systems All modules undergo quality assurance testing to ensure dependable and reliable performance Please verify the supported memory (RAM) specifications of your system prior to purchase to ensure compatibility A-Tech provides a Lifetime Warranty for all orders & offers complimentary United States based Tech Support before, during, & after your purchase