4GB DDR4 1Rx8 PC4-2133P, PC4-17000 (BUS: 2133MHz), SK Hynix, Model: HMA451S6AFR8N-TF N0 AB, Samsung M471A5143EB0-CPB, M471A5143DB0-CPB Notebook Memory or RAM module, Voltage : 1.2V, Non-ECC Unbuffered CL15 260-Pin SODIMM

Technical Specifications  Brand : SK Hynix/SAMSUNG Product Type: DDR4  Capacity : 4.0 GB Bus Speed:  PC4-17000 DDR4-2133MHz(2133P) Form Factor : SO-DIMM (Unbuffered) Number of Pins: 260 (1R x 8) Number of Chip: 8 Number of Modules: 1 Voltage: 1.2V CL15 Compatible Devices : Laptop, MacBook, MacMini & imac Item Status: Original (QC) Warranty: 1 Year (360 Days) Fitting Charge : Not Applicable *** Kindly Note………………. To avoid wrong order placed or wrong item you bought, please check your RAM Type, BUS speed , capacity, form factor , identifying number etc. before ordering.