Selling a genuine, highly reliable SK hynix 4GB DDR4 3200MHz laptop memory stick. This is an original system module removed from a premium laptop during an immediate upgrade. Tested and working perfectly. Technical Specifications: • Brand: SK hynix (Made in Korea) • Capacity: 4GB • Memory Generation: DDR4 • Form Factor: SO-DIMM (Laptop / Mini PC / All- in-One compatible) • Speed: 3200 MHz / 3200 MT/s (PC4-3200AA) • Rank/Configuration: 1Rx16 (Single Rank) • Model/Part Number: HMA851S6DJR6N-XN • Operating Voltage: Low power 1.2V (Highly energy efficient)