Item Type: SFP Module Material: Zinc Alloy Product Model: SFP GE SC SM1550 Speed: 1.25G Transmission Distance: 20km Working Wavelength: TX1550/RX1310nm Applicable Equipment: Suitable for Fiber Switches, Routers, Network Cards1Fiber Type: 1.25Gb/s rate, up to 20KM transmission distance, with DDM function, compliant with IEEE 802.3z standard. 2Excellent Heat Dissipation: Less than 1.05W power dissipation and thermal pads provide great heat dissipation. 3Plug and Play: Plug and play, hot swappable, simple operation, easy to use, with great performance. 4Broad Compatibility: Widely used in fiber optic switches, routers, servers, firewalls or other fiber optic equipment with 1.25Gb SFP ports. 5Premium Material: Made of zinc alloy, manufactured under strict quality control system, each module is tested one by one on different switches before leaving the factory to ensure compatibility with different brands of switches.1 x SFPModule