The Samsung 4GB 1Rx16 PC4-3200AA-SCO-11 Laptop RAM Single Stick is a DDR4 SDRAM memory module designed for laptops. With a total capacity of 4GB and a bus speed of PC4-25600 (DDR4-3200), it offers fast and reliable performance. This SO-DIMM module is manufactured by Samsung in China and comes with a lifetime warranty, making it a durable and trustworthy choice for enhancing the memory capacity of your laptop. The unit features ECC memory for error correction and is a single stick with 260 pins for easy installation.