Cisco 10GBASE-ER XENPAK Module for SMF. Maximum data transfer rate: 10000 Mbit/s, Cabling technology: 10GBASE-ER. Connectivity technology: Wired. Maximum transfer distance: 1574803.1" (40000 m), Wavelength: 1550 nm. Compliance industry standards: IEEE 802.3ae. Power consumption (typical): 8 W