ZyXEL SFP-LX-10-D Gigabit-LX Mini-GBIC SFP. Up to 10km using 9m single mode

connectivity Technology    Wired
Data Link Protocol    Gigabit Ethernet
Data Transfer Rate    1 Gbps
form factor    Plug-in module
features    Digital Diagnostics Monitoring Interface (DDMI)
Interface    1 x Ethernet 1000Base-LX - LC
Compatible card slots    1 x SFP (mini-GBIC)
Max transfer distance    10 km
Service and support    Limited warranty - 5 years
Type of device    SFP Transmitter / Receiver Module (Mini GBIC)
Type of cabling    1000Base-LX