Features:ESP8266 WIFI module, WIFI module four laminate design.Wide voltage input, input voltage: DC 7V – DC 30V.Input overvoltage protection, input with TVS, voltage exceeding 33V, automatic protection.Input overcurrent protection.220V 10A relay, one normally open, one normally closed.Specifications:Operating Voltage: DC 7-30VColor: green & blueSize: 65*40.5*17mm