The FL-DUF0101-SC20A/B is an industrial-grade unmanaged Ethernet switch that offers a simple yet effective solution for high-speed data transmission in harsh environments. Equipped with 1 Gigabit Ethernet port (10/100Mbps auto-negotiation) and 1 SC Gigabit fiber port, it supports stable fiber transmission over distances up to 20km, making it ideal for industrial surveillance, control systems, and long-distance fiber network extensions. Designed with industrial-grade components, it operates reliably in wide temperature ranges and under strong electromagnetic interference. The device adopts a fanless, plug-and-play structure housed in a rugged metal casing, ensuring high durability, low maintenance, and effortless deployment in smart factories, outdoor installations, and automation systems.