With relay output, this module is used to detect the humidity and control related the device power directly. This product make use of high quality HR202 humidity sensor. The comparator outputs drive relays directly. It connects to 220V AC or other devices. With leads, sensor interface can be installed with pin. It's easy to install with 4 0.3cm fixing bolt hole. Current will be more than 150mA Supply Voltage: 5VDC Maximum Load: 10A 250VAC 10A 125VAC 10A 30VDC 10A 28VDC When ambient humidity exceeds the setting threshold value the relay sucks and shuts, what's more, the common terminal connects to the start. If the ambient humidity below the setting threshold value, the situation will be counter. Common, normally open and normally closed three ports are equivalent to a dual-control switch. When the relay coil is electrified, the common will connect to the normally open, otherwise, the common will connect to normally closed.Brand new