Feature:- Built with RealTek10 Base-T Ethernet Controller - Link and Activity LED`s - Interface PINs: SA0-SA4 SD0-SD7 IORB/IOWB & INT0 - Compliant to Ethernet II and IEEE802.3 10Base5, 10Base2, 10BaseT - Suitable for 5V Systems - Board Size: 81mm x 48.5 mm - RTL8019AS Official Website