HP 0231A72X - X135 10G XFP LC ER transceiver - 10-Gigabit Small Form-factor Pluggable (XFP) 10-Gigabit LR standard, with 1550nm laser that provides a 10-Gigabit connectivity up to 40km (24.9 miles) on single-mode fiber - Has one LC 10-GbE port Retail