ESP8266 10A 220V Network Relay WIFI Module Specifications: Model: ESP8266 Color: Green Size(L*W*H):65 x 40 x 18 mm ISM: 2.4 GHz PA:+ 25 dBm Relay voltage: 220 V Relay Current: 10 A Input voltage: DC 7 V~30 V Input overvoltage protection: Yes Input overcurrent protection: Yes Features: 1.More safe with relays PCB pin anti-climb design. 2.With ESP8266 Wifi module,4-layers board design. 3.One output status indicator, one input status indicator. 4.220V 10A relay, one normally open, one normally closed. 5.One way optocoupler isolation input, TVS input protection. 6.Access control server via TCP CLIENT mode Via HTTP protocol control.High-current terminals. 7.Input overvoltage protection, input with TVS, when voltage exceeds 33V, automatic protection will operate.