The Siig JJ-p45012-S6 Cyberserial 4S is a high-quality interface/add-on card manufactured by SIIG in Taiwan. This unit is guaranteed with a 3-year manufacturer's warranty, ensuring reliability and support. It is designed for compatibility with PCI Express x1 slots, making it easy to install and use in various computer systems. This product is factory sealed, providing assurance of its authenticity and performance for users seeking a dependable solution for their computer networking needs.