Product model: HTB-3100A/B Product Name: Single-mode single-fiber 100-megabit transceiver Transmission distance: 25Km Optical Interface: S Interface Transmission wavelength: algae 1X3mm Auxiliary transmission rate: 100 Mbp Product size nano "70mm'25mm" Product list: 1Pair transceiver, 4 external power supply, instruction book Product Material: High Quality Metal