Small size, simple wiring, low power consumption. High switching capacity, strong anti-interference, high stability characteristics. It also has non-toxic and corrosion-resistant characteristics. Easy to install, convenient to use and long service life. The product can be widely used in water supply, drainage and automatic liquid level control with a variety of pump support. The floating ball is made of high-quality materials and has the ability to resist high and low temperatures and will not decompose harmful substances to humans. The thickening of the wire core increases the load-bearing capacity and is not easy to heat. Automatic adjustment, easy installation, convenient operation, reasonable design. Rated voltage: AC 110/220V Frequency: 50/60 Hz Protection level: IP68 Maximum current: AC16(4)A Maximum operating temperature: 60c 1. Automatic water replenishment mode Connect the blue wire of the controller to the water pump, the black wire to the neutral wire, and the brown wire to disconnect and isolate it. 2. Automatic drainage mode Connect the brown wire of the controller to the water pump, the black wire to the neutral wire, and the blue wire to disconnect and isolate it. Delivery quantity: 1 piece