1. Support hardware TCP IP protocol: TCP, UDP, ICMP, IPv4ARP, IGMP, PPPoE, Ethernet 2. Support automatic communication manual (full duplex and half duplex) 3. Support automatic , automatic signal polarity correction 4. Support ADSL connection (Support VPN CHAP authentication mode in PPPoE) 5. Support four ports to run at the same time Multi-function LED signal output (TX, RX, full-duplex half-duplex, address , connection, speed, etc.) Embedded 10 BaseT 100 BaseTX Ethernet physical layer Model:Network Expansion Board Type:Power Module Supply current:1A Power supply voltage:1 Number of pins:16p Use:instrument Application field:3C digital Colour:Blue Material:plastic Size:12.19x9.3x2.59 cm Package Contents: 1 x expanding board 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.