WN504 Multifunction Network Impairment Test Card is a comprehensive network emulation and test equipment that integrates network impairment emulation, network traffic testing, network data loopback, and multi-port NIC feature. It can meet a variety of network testing requirements and support the integration of multiple functions, providing a more convenient test solution for multiple verification and testing requirements of network equipment and network systems. The easy-to-use interface is easy to use, minimizing test costs and significantly improving test efficiency.