Upgrade your laptop's memory capacity with this 1GB (2x512MB) PC2-4200S memory RAM kit. The kit includes 2 SO-DIMM DDR2 SDRAM memory modules with a total capacity of 1 GB. Each module has a capacity of 512 MB and has 200 pins. The bus speed of the memory RAM kit is PC2-4200. This memory RAM kit is perfect for those who require additional memory capacity on their laptops. With the kit's high-speed bus, users can enjoy faster and more efficient performance. The kit is compatible with a variety of laptop brands and models, making it an ideal choice for anyone looking to upgrade their laptop's memory.