Feature:1. W5100 is a multi-functional single-chip network interface chip with a 10/100 Ethernet controller integrated inside. Mainly used in embedded systems with high integration, high stability, high performance and low cost2. Multiple interfaces can be selected, direct bus, indirect bus and SPI bus3. Up to 4 independent ports, internal integrated 16KBYTE transceiver buffer4. 3.3V power supply, IO signal compatible with 5V voltage, come with network port, dual row 2x14 2.0mm pins5. Use W5100 to realize Internet connection without operating system. W5100 is compatible with IEEE802.3 10BASE-T and 802.3u 100BASE-TX6. Use W5100 does not need to consider Ethernet control, only simple port (socket) programming is requiredSpecification:Item Type: Ethernet ModuleMaterial: ABSSupport: Support hardware TCP/IP protocol stack, support TCP, UDP, ICMP, IGMP, IPv4, ARP, PPPoESize: Approx. 51.6 x 29.8mm / 2 x 1.2in.Package List:1 x Ethernet Module