Industrial SFP Module, 1Gb, LC MM, 550m, Tx:850nm, DDMI
Small form-factor pluggable transceiver - Wikipedia
EXTRALINK SFP module 1.25G WDM 1310/1550NM SM 3KM LC - PAIR (EL-SFP-SM-1G-3KM-PR) - The source for WiFi products at best prices in Europe - wifi-stock.com