TPLINK TL-SM321B
1000BASE-BX GIGABIT SINGLE MODE
Features & Specifications
Gigabit Single-Mode WDM Bi-Directional SFP Module
SPEC: TX:1310nm/RX:1550nm, Single-mode, 10km
RM149.00
Gigabit Single-Mode WDM Bi-Directional SFP Module
SPEC: TX:1310nm/RX:1550nm, Single-mode, 10km
305 m CAT6 UTP Network Cable (Solid Copper, 0.55 mm)
Hi-PoE Midspan
Single-mode Optical Module 1.25G
PoE Extender 
Surge Protector