Genuine SK Hynix 8GB DDR4-2400 laptop memory, part number HMA81GS6AFR8N-UH. Pulled from a working laptop in excellent condition. Specs: 8GB, DDR4-2400 (PC4-19200), 1Rx8 single rank, 260-pin SODIMM, 1.2V, non-ECC. Standard laptop/notebook memory that works in any system taking DDR4 SODIMMs. A common upgrade for 6th/7th-gen Intel laptops where DDR4-2400 is the native speed. Note: This is laptop SODIMM memory (260-pin), not desktop DIMM.