The Kingston Laptop Memory 16GB 2Rx8 PC4 2400T K821PJ is your go-to choice if you want to upgrade your laptop's memory. This module is a DDR4 SO-DIMM with a bus speed of PC4-19200 (DDR4-2400). It is designed specifically for laptops and has a total capacity of 16GB. Its model number is K821PJ and it has 260 pins. This memory module is a great choice for those who want to increase their laptop's performance without spending a lot of money.