SFP-Port 1000 BASE-SX mini-GBIC module - 550m. Multi mode. DDM Support. Complies with the IEEE 802.3z Gigabit Ethernet standard. LC connector. Differential PECL inputs and outputs. Single power supply 3.3V. TTL signal detect indicator. Hot Pluggable. Class 1 laser product complies with EN 60825-1. Operating temperature: -40ºC up to 75º C.