Self-Adapting RJ45 Ports: This SFP fiber switch offers multiple SFP optical ports and 10/100M adaptive RJ45 network ports. Lossless Transmission: This Ethernet optical switch supports lossless and efficient transmission of multiple protocols. Features full/half duplex self-adaptation and supports IEEE802.3x flow control, backpressure flow control. LED Indicator: This Ethernet fast switch is designed with an LED indicator for easy status monitoring of TX, FX LINK/ACT, POWER, and FDX. Complies with IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab, and IEEE 802.3z standards. Plug and Play: This Ethernet switch is plug and play, supports automatic MDI/MDI X port flipping, supports a jumbo frame size of 9K bytes, and supports an operating temperature range from 0 to 60. 120km Extension: This SFP Ethernet switch can extend the fiber distance from 0 to 120km when used with different types of SFP modules. Supports media access control address self-learning and QoS, ensuring efficient network operation.