The HWIC-2FE is a 2-port expansion module that provides two 10/100 Ethernet ports for Cisco routers. It offers Layer 3 routing and quality of service capabilities. The module has dimensions of 7.8 x 12 x 1.9 cm, weighs 73g, and supports Ethernet, Fast Ethernet, VLAN tagging, and various networking protocols. It is designed to expand the capabilities of several Cisco router models.