This 1 channel relay board operates on 12V. Can be used directly to control 240V power appliances from most of the microcontrollers and other control system circuits. The board has a high-quality relay, which can operate a maximum of 10A @ 120V or 7A @ 240V AC, 7A/24V DC. Relay has three connections – Common – C, Normally Open-NO, Normally Closed-NC brought out to 3 pin screw terminals which makes it easy to make and remove connections. The board has a power indication and a relay status LED to ease debugging. Power input and relay control signals are brought to header pins on the board.