The KVR21S15S8/4-SP is a DDR4 SODIMM memory module from Kingston, part of their renowned value RAM line designed for cost-effective performance. Featuring a capacity of 4GB and operating at 2133MHz (DDR4-2133P, PC4-17000), it is engineered to provide reliable and speedy performance for a wide array of computing needs. The memory module employs a single-rank x8 configuration (1Rx8) with 512Mx8 chips, ensuring compatibility with a broad range of laptops and other systems supporting DDR4 SODIMM 260-pin memory slots. Kingston's dedication to quality means this module is not only affordable but also meets strict industry standards, making it an ideal choice for users looking to upgrade their system's memory capacity for enhanced multitasking and smoother application performance without breaking the bank.