NWANSI 100Mbps Fiber Optic Media Converter is a high-performance PCBA Board Ethernet switch designed to bridge fiber optic and copper networks, supporting 10/100Mbps self-adapting data transmission over single-mode fiber up to 20KM. Featuring a sleek black design, this converter is equipped with 4 RJ45 Ethernet ports and 2 SC single fiber connectors (A+B), making it ideal for data centers, security monitoring systems, enterprise offices, and long-distance network extensions where reliable connectivity is critical. Engineered with a 2*155M fiber optic port rate and dual wavelengths (1310nm/1550nm), this media converter ensures stable bidirectional data transmission across 0-20KM distances, overcoming the 100m limit of traditional copper cables. The 4 RJ45 ports support 10/100Mbps auto-negotiation, automatically adjusting to the optimal speed without manual configuration—saving time on installation and troubleshooting for IT professionals and network administrators alike. Built with environmental hardening, this converter performs reliably in extreme temperatures, making it suitable for both indoor and harsh industrial environments. Each port is equipped with clear LED indicators, providing real-time feedback on power, link, and data transmission status to simplify installation, commissioning, and maintenance. As a dedicated PCBA board media converter, it offers a compact, efficient design that fits seamlessly into various network setups. 100% brand new and high-quality, this black fiber optic media converter delivers consistent performance for long-term use. Important Note: This is only the optic converter—no power adapter is included. It is designed to work with standard external power supplies, offering flexibility for custom network configurations. Perfect for extending Ethernet networks over long distances, this converter is a cost-effective solution for commercial and industrial networking needs. Thank you for your visit and happy cooperation!