1.Support the switch between 10/100Base-TX and 100Base-FX 2.1*1.25Gbps full-duplex fiber ports and 4*1000M 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.Support single mode single fiber,single mode dual fiber ,multi-mode dual fiber and SFP slot 6.Support IEEE802.1d Spanning Tree 7.Support high performance function on each port 8.Support 5V-12V voltage input 9.Support IEEE 802.3x flow control and back pressure control 10.Require no configuration and will instantly operate as soon as you power it up 11.Low power consumption chip with heat sink built in to longtime efficient operation Standards IEEE802.3 10Base-T IEEE802.3u100Base-TX/FX IEEE802.3z1000Base-/LX IEEE802.3x flow control IEEE802.1p IEEE802.1d Spanning Tree Connector: RJ45 Ethernet Port Data Rate:10/100M or 10/100/1000M Distance: 100m UTP Type: UTP-5E or higher level Fiber Port Connector: SC/FC/ST/SFP slot Data Rate: 155M or 1.25Gbps Optical Wavelength: 850nm/1310nm/1490nm/1550nm Distance: 550m~120km Performance Processing Type: Store and Forward Table Size:4K/6K/8K Buffer Space: 500kbs/1Mbit/2Mbit Jumbo Packet: 1518 bytes Back bandwidth: 3.8G/5.6G/7.2G Time Delay: Less than 150s Colour:blue Material:PC+metal Package Contents: 1 pair x Converter board(Due to different product batches, the appearance may be different, which does not affect use.) 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.