Features: The electrical interface will automatically negotiate to 100Mbps or 1000Mbps Ethernet rate without modification. The optical interface runs at 1000Mbps Ethernet speed. Both are environmentally hardened and can operate at extreme temperatures. The LED indicator is used to confirm the operating status of the device. The package includes:1. HTB-GS-03x1 pair (1 side A, 1 side B)2. Power adapter x2PCS (please tell us your power adapter, or we have a standard adapter) Specifications: Material: Metal Size: Approx.7x2.6x9.3cm/2.76x1.02x3.66inch Standard for American standard power adapter; British, European Union, and Australian standards can be provided upon request. The most important functions: Support switching between 1000Base-T and 1000Base-SX 1x1.25Gbps full-duplex optical port and 1x1000M Ethernet port Each port has a full LED indicator, which is convenient for installation, debugging and maintenance Support direct forwarding mode, support less delay Low power consumption, only 1.5W at full load Support isolation for protection function, good data security Small size, suitable for installation in different places Auto-negotiation low-power chip to ensure long-term stable operation Note: 1.Please allow 1-2cm 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. Package includes: 1 Pair Fiber Transceiver