SainSmart Web TCP/IP 10A Relay Remote Control Kit with Network Web Server 8 Channels Relay Ethernet Controller Remote Control Board + 8-CH Relay Module Control switches remotely together with 8 Channel relay! Support for 8 Channels relay which means you could controll more to 8 different devices at the same time. RJ45 interface, via RJ45 telecommunications connection for network control. Unique dual TCP connect control, corresponding with above trait, local as TCP server Accept client control, when connect to remote server as TCP client Supply core module detailed information