1. High speed SPI interface 80MHz. Hardware-TCPIP-protocol stack user built in, almost without understanding the complex network protocol knowledge. Supports up to 8 Socket 2. Support TCP, UDP, ICMP, IPv4, , IGMP, PPPoE protocol. Integration of the data link layer, physical layer. Support the 3. Support high speed serial peripheral interface (SPI model 0, 3). Internal 32K bytes receive buffer. The embedded 10BaseT/100BaseTX Ethernet physical layer (PHY) 4. Support auto negotiation (10/100-Based full duplex or half duplex). Does not support the IP patch. The working voltage of 3.3V, I/O and 5V voltage signal 5. LED display (full duplex or half duplex, network connection, network speed,active). Pin type package ultra small, convenient for embedded applications. Application of C sample project Power supply mode:3.3V external power supply, current should be more than 200mA Control interface:The TTL level, 3.3V SPI interface PCB size:23 x 25 mm Mechanical Dimensions:28.5 x 23 x 24mm Condition: New Model Number: -ES1 W5500 color:As shown Material:PC+Metal Package Contents: 1 x W5500 module Only the above package content, other products are not included. Note: Light 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.