Features: 100% brand new and high quality 100 m to 120 km through copper cable. Can extend the transmission distance; there are many others Fast Ethernet switch 10/100Base-Tx to 100Base-FX fiber optic switch Fast Ethernet switch is an Ethernet fiber optic switch specially designed for network monitoring. It has 2x10/100Mbps Ethernet port and 6x155Mbps optical fiber port. Using RTL8309N chip to ensure It has the advantages of isolation protection, good data security, stable work, and convenient maintenance. Low power consumption, high stability. It extends the transmission distance of the network in the following ways Material: Metal Color :Black Standard configuration: 1 1310nm A-side optical fiber module and 1 1550nmB side, 2 1550nm B-side or 2 1310nm A-side can be provided upon request. Package Includes: 1PcxFiber Transceiver Specifications: Material: Metal Color :Black Size: Approx.8.8x2.7x7cm/3.46x1.06x2.76inch Support switching between 10/100Base-TX and 100Base-FX 6x155Mbps full duplex optical fiber port and 2x100M Ethernet port, with auto-negotiation function Support 100M speed, and half/full duplex, with auto-negotiation function Each port has full LED indicator Support single-mode single-fiber, single-mode dual-fiber, multi-mode dual-fiber and SFP slots Support IEEE802.1d spanning tree Support high-performance QoS function for each port Support 5V input voltage Support IEEE 802.3x flow control and back pressure control No need to configure, run immediately after booting Low power consumption chip built-in heat sink to ensure long-term efficient operation note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.