Model: HK-SFP-1,25G-20-1310-DF Type: Fiber Optic SFP Module Visibility: 1.25Gbps, 1310nm Distance: 20 km Connection type: Duplex Fiber Optic Input/Output: LC (Duplex) Operating temperature: 0°C to 70°C Dimensions: 57.4mm x 13.4mm x 8.5mm Protocol: IEEE 802.3z Additional features: Provides high stability and reliability