The water level controller module is convenient for the drainage control of your home. Features: Making the aquarium/water tower automatically open the pump when lack of water, automatically stop the pump(solenoid valve) when full of water. Working Principle: When the water level is lower than the "Low level", the water pump starts to supply water to the water tower; when the water level is higher than the "High level", the water pump stops supplying water. Maximum load of 10A / 250V AC, 10A / 125V AC, 10A / 30V DC, 10A / 28V DC, 10A / 12V DC. With compact size, high switching capacity, simple wiring, high stability and strong anti-interference function. Can be applied for domestic water tower, aquarium water changer, conducting liquid autocontrol system, auto feeder&waterer, solenoid valve water pump, drainage control, etc. Note: *This product does not require purchasing a separate probe which can be replaced with a household wire. *For safety, use an AC/DC power supply with good isolation. Specifications: Model: LC25A01 Material: FR4 Working voltage: DC 12-15V(AC 9-12V) Standby current 10MA Working current 40MA Maximum load: 10A / 250VAC, 10A / 125VAC, 10A / 30VDC, 10A / 28VDC, 10A / 12VDC Item Size: 5.4*2.7*2cm / 2.12*1.06*0.78in Package Size: 6*3*3cm / 2.36*1.18*1.18in Item Weight: 24g / 0.84oz Package Weight: 26g / 0.91oz Packing List: 1 * Controller Module