Warranty: If you are not satisfied with the product we received, you can apply for an unconditional return and refund within 60 days. For any questions about this product, you can contact us at any time. We will get back to you as soon as possible. Thank you for your support!. 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. Hassle-Free Setup: Our plug-and-play fiber media switch is easy to set up - just plug in the fiber port and UTP port and it works immediately. It comes with an external power supply and supports 9KB jumbo frames. Plus, it supports a wide temperature range of 0°C to 60°C. 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. 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.