The New Cisco DP-9800-KEM Desk Phone Key Expansion Module is a unit designed for Cisco IP Phones 9851/9861/9871. It features two network ports with a maximum data rate of 1000 Mbps/1 Gbps, compatible with USB 2.0 (USB-A male and female). This product is made by Cisco, has a sleek design with dimensions of 8.9 inches in length, 1.9 inches in height, and 5.0 inches in width. This expansion module is a reliable and efficient solution for expanding the capabilities of your Cisco IP phone system.