1.Support the switch between 10/100/1000Base-T and 1000Base-SX/LX 2.1x1.25Gbps full-duplex fiber ports and 1x1000M Ethernet ports with auto-negotiation function 3.Support 1000M speed rate,/MDIX and half/full-duplex with auto-negotiation function 4.Each port has the complete LED Indicator light 5.There are 3 mode available. They are single mode single fiber, single mode dual fiber and multi mode dual fiber. Support IEEE802.1d Spanning Tree Support high performance function on each port,support broadcasting storm control Support 5-24V voltage input through network cables from ending equipment. 4/5+,7/8- are for power supply. 5-24V DC voltage output. Internal 4K Address Entities Support 9216 bytes Jumbo packet Support IEEE 802.3x flow control and back pressure control Require no configuration and instantly operate as soon as you power it up Low power consumption chip with heat sink built in to longtime efficient operation. Color: As Shown Material: PCB Package Contents: 2 x Optical to Electrical Converters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.