Features:The product is based on the detection of the pool (tower) water level to control the high current relay to achieve the control of pumping water. The utility model has the advantages of small volume, simple connection, small power consumption, large switching capacity, strong anti-interference and high functional stability. It can steadily open the pump (solenoid valve) to pump water when the pool (tower) is short of water, and stop the pump (solenoid valve) when the water is full. Output is relay switch. Power supply: AC 9-12V or DC 12-15V Relay contact capacity: AC 250V 10A or DC30V 10A Circuit board size: long 6.3CM x width 3.9CM x high 2.5CM Package Included:1 x DIY Level Switch Sensor Water Level Detection Module Kit