[USRES1]-ES1 is the Ethernet module of a SPI interface, interface is TTL level of 3.3V, power supply voltage of + 3.3V, please that the current is not less than 200mA, voltage is continuous and stable + 3.3V. [Compatible] 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. [Design compact] Support TCP, UDP, ICMP, IPv4, , IGMP, PPPoE protocol; Integration of the data link layer, physical layer; Support the ; Support high speed serial interface (SPI model 0, 3). [Easy operation] Internal 32K bytes receive buffer; The embedded 10BaseT / 100BaseTX Ethernet physical layer (PHY); Support auto negotiation (10/100-Based full duplex or half duplex). colour: as shown Material: plastic + metal Package Contents: 1 x W5500 Ethernet module Note: due to different batches, the printed words may be different, which does not affect the normal use of the product 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.