The Kingston 4GB 1Rx16 PC4-2666V-S Laptop SO-DIMM Memory RAM is a high-quality memory module designed for laptops. With a total capacity of 8GB and a capacity per module of 4GB, this DDR4 SDRAM module is perfect for increasing your laptop's memory capacity. It features ECC memory for enhanced error correction and a lifetime manufacturer warranty for added peace of mind. With its compact SO-DIMM form factor and 260 pins, this memory module is a reliable and efficient choice for improving your laptop's performance.