Item Type: Relay ModuleWorking Voltage: AC 90-250V, DC 7-12V, USB 5V. WIFI Chip: ESP8266Communication Protocol: UARTLoad Voltage: AC 250V or DC 30V, maximum. Load Current: 10A, maximum. Working Temperature: -25 ~ 85Working Humidity: 5%~95% RH .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Working Voltage: Supports AC 90-250V, DC 7-12V and USB 5V, the relay module has wide compatibility and broad application as well. 2Stable in Using: The maximum load voltage is AC 250V or DC 30V, and the maximum load current is 10A, very reliable in operation. 3Strong in Drive: WiFi module program download ports are all exported for secondary development, strong driving and stable working. 4Good Durability: Not likely to rust, the WiFi development board with standard design has excellent durability for long term using. 5Easy to Install: Comes with a compact size and a light weight as well, the whole installation can be quickly completed in minutes.