Features: 1.Up to 120km: Fiber transceiver provides multiple Gigabit SFP optical ports and 10/100/1000M adaptive RJ45 network ports, users can choose different SFP optical modules according to the needs of the site, hot swap FX ports to extend the fiber distance up to 120km. 2.Efficient Transmission: Ethernet fiber transceiver supports a variety of protocol data lossless and efficient transmission, full and half duplex adaptive, support IEEE802.3x flows control, back pressure flows control, support multicast, support QoS, to ensure efficient network operation. 3.LED Indicators: Easy to view LED indicators provide status to easily monitor network activity, compliant with IEEE 802.3/802.3u/802.3af. Status LEDs for TX, FX LINK/ACT, POWER, FDX allow easy monitoring of network status. 4.Plug and Play: Plug and play, support MDI, MDI X port auto flip, no need to set up separately, plug in power, fiber, network can be used. 5.Metal: Ethernet fiber switch supports jumbo frame size of 9K bytes, supports operating temperature range of 0C to 60C, and is made of metal for rugged durability. specification:Item Type: SFP Ethernet Fiber Switch Material: Metal Plug Voltage: 100-240V Supported Protocols: IEEE 802.3i IEEE 802.3u IEEE 802.3ab IEEE 802.3z Optical Port: 4 Electrical Port: 2 Data Rate: Optical Port 1000mbps, Electrical Port 10/100/1000 Mbps PackageList: 1 xEthernetFiberSwitch 1xPowerAdapter 1 x User Manual